This is the 2nd version of the third batch of driver conversions for the
add_disk() error handling. This and the entire 7th series of driver
conversions can be found on my 20210927-for-axboe-add-disk-error-handling
branch [0].
On this v2 series the following changes have been made since the v1
series of this patch set:
- rebased onto linux-next tag 20210927
- z2ram: fixed compile warning reported by 0day and Geert Uytterhoe
- um/drivers/ubd_kern: added the reviewed-by tag by Gabriel Krisman
Bertazi
[0] https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git/log/?h=20210927-for-axboe-add-disk-error-handling
Christoph Hellwig (4):
pcd: move the identify buffer into pcd_identify
pcd: cleanup initialization
pf: cleanup initialization
pd: cleanup initialization
Luis Chamberlain (11):
z2ram: add error handling support for add_disk()
aoe: add error handling support for add_disk()
m68k/emu/nfblock: add error handling support for add_disk()
drbd: add error handling support for add_disk()
um/drivers/ubd_kern: add error handling support for add_disk()
xtensa/platforms/iss/simdisk: add error handling support for
add_disk()
n64cart: add error handling support for add_disk()
pcd: add error handling support for add_disk()
pcd: fix ordering of unregister_cdrom()
pcd: capture errors on cdrom_register()
pd: add error handling support for add_disk()
arch/m68k/emu/nfblock.c | 9 +-
arch/um/drivers/ubd_kern.c | 13 +-
arch/xtensa/platforms/iss/simdisk.c | 13 +-
drivers/block/aoe/aoeblk.c | 6 +-
drivers/block/drbd/drbd_main.c | 6 +-
drivers/block/n64cart.c | 12 +-
drivers/block/paride/pcd.c | 304 +++++++++++++---------------
drivers/block/paride/pd.c | 144 ++++++-------
drivers/block/paride/pf.c | 223 +++++++++-----------
drivers/block/z2ram.c | 7 +-
10 files changed, 364 insertions(+), 373 deletions(-)
--
2.30.2
From: Christoph Hellwig <[email protected]>
Refactor the pcd initialization to have a dedicated helper to initialize
a single disk.
Signed-off-by: Christoph Hellwig <[email protected]>
---
drivers/block/paride/pcd.c | 286 ++++++++++++++++---------------------
1 file changed, 127 insertions(+), 159 deletions(-)
diff --git a/drivers/block/paride/pcd.c b/drivers/block/paride/pcd.c
index 8903fdaa2046..93ed63626232 100644
--- a/drivers/block/paride/pcd.c
+++ b/drivers/block/paride/pcd.c
@@ -183,8 +183,6 @@ static int pcd_audio_ioctl(struct cdrom_device_info *cdi,
static int pcd_packet(struct cdrom_device_info *cdi,
struct packet_command *cgc);
-static int pcd_detect(void);
-static void pcd_probe_capabilities(void);
static void do_pcd_read_drq(void);
static blk_status_t pcd_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *bd);
@@ -302,53 +300,6 @@ static const struct blk_mq_ops pcd_mq_ops = {
.queue_rq = pcd_queue_rq,
};
-static void pcd_init_units(void)
-{
- struct pcd_unit *cd;
- int unit;
-
- pcd_drive_count = 0;
- for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
- struct gendisk *disk;
-
- if (blk_mq_alloc_sq_tag_set(&cd->tag_set, &pcd_mq_ops, 1,
- BLK_MQ_F_SHOULD_MERGE))
- continue;
-
- disk = blk_mq_alloc_disk(&cd->tag_set, cd);
- if (IS_ERR(disk)) {
- blk_mq_free_tag_set(&cd->tag_set);
- continue;
- }
-
- INIT_LIST_HEAD(&cd->rq_list);
- blk_queue_bounce_limit(disk->queue, BLK_BOUNCE_HIGH);
- cd->disk = disk;
- cd->pi = &cd->pia;
- cd->present = 0;
- cd->last_sense = 0;
- cd->changed = 1;
- cd->drive = (*drives[unit])[D_SLV];
- if ((*drives[unit])[D_PRT])
- pcd_drive_count++;
-
- cd->name = &cd->info.name[0];
- snprintf(cd->name, sizeof(cd->info.name), "%s%d", name, unit);
- cd->info.ops = &pcd_dops;
- cd->info.handle = cd;
- cd->info.speed = 0;
- cd->info.capacity = 1;
- cd->info.mask = 0;
- disk->major = major;
- disk->first_minor = unit;
- disk->minors = 1;
- strcpy(disk->disk_name, cd->name); /* umm... */
- disk->fops = &pcd_bdops;
- disk->flags = GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
- disk->events = DISK_EVENT_MEDIA_CHANGE;
- }
-}
-
static int pcd_open(struct cdrom_device_info *cdi, int purpose)
{
struct pcd_unit *cd = cdi->handle;
@@ -679,90 +630,31 @@ static int pcd_probe(struct pcd_unit *cd, int ms)
return -1;
}
-static void pcd_probe_capabilities(void)
+static int pcd_probe_capabilities(struct pcd_unit *cd)
{
- int unit, r;
- char buffer[32];
char cmd[12] = { 0x5a, 1 << 3, 0x2a, 0, 0, 0, 0, 18, 0, 0, 0, 0 };
- struct pcd_unit *cd;
-
- for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
- if (!cd->present)
- continue;
- r = pcd_atapi(cd, cmd, 18, buffer, "mode sense capabilities");
- if (r)
- continue;
- /* we should now have the cap page */
- if ((buffer[11] & 1) == 0)
- cd->info.mask |= CDC_CD_R;
- if ((buffer[11] & 2) == 0)
- cd->info.mask |= CDC_CD_RW;
- if ((buffer[12] & 1) == 0)
- cd->info.mask |= CDC_PLAY_AUDIO;
- if ((buffer[14] & 1) == 0)
- cd->info.mask |= CDC_LOCK;
- if ((buffer[14] & 8) == 0)
- cd->info.mask |= CDC_OPEN_TRAY;
- if ((buffer[14] >> 6) == 0)
- cd->info.mask |= CDC_CLOSE_TRAY;
- }
-}
-
-static int pcd_detect(void)
-{
- int k, unit;
- struct pcd_unit *cd;
-
- printk("%s: %s version %s, major %d, nice %d\n",
- name, name, PCD_VERSION, major, nice);
+ char buffer[32];
+ int ret;
- par_drv = pi_register_driver(name);
- if (!par_drv) {
- pr_err("failed to register %s driver\n", name);
- return -1;
- }
+ ret = pcd_atapi(cd, cmd, 18, buffer, "mode sense capabilities");
+ if (ret)
+ return ret;
+
+ /* we should now have the cap page */
+ if ((buffer[11] & 1) == 0)
+ cd->info.mask |= CDC_CD_R;
+ if ((buffer[11] & 2) == 0)
+ cd->info.mask |= CDC_CD_RW;
+ if ((buffer[12] & 1) == 0)
+ cd->info.mask |= CDC_PLAY_AUDIO;
+ if ((buffer[14] & 1) == 0)
+ cd->info.mask |= CDC_LOCK;
+ if ((buffer[14] & 8) == 0)
+ cd->info.mask |= CDC_OPEN_TRAY;
+ if ((buffer[14] >> 6) == 0)
+ cd->info.mask |= CDC_CLOSE_TRAY;
- k = 0;
- if (pcd_drive_count == 0) { /* nothing spec'd - so autoprobe for 1 */
- cd = pcd;
- if (cd->disk && pi_init(cd->pi, 1, -1, -1, -1, -1, -1,
- pcd_buffer, PI_PCD, verbose, cd->name)) {
- if (!pcd_probe(cd, -1)) {
- cd->present = 1;
- k++;
- } else
- pi_release(cd->pi);
- }
- } else {
- for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
- int *conf = *drives[unit];
- if (!conf[D_PRT])
- continue;
- if (!cd->disk)
- continue;
- if (!pi_init(cd->pi, 0, conf[D_PRT], conf[D_MOD],
- conf[D_UNI], conf[D_PRO], conf[D_DLY],
- pcd_buffer, PI_PCD, verbose, cd->name))
- continue;
- if (!pcd_probe(cd, conf[D_SLV])) {
- cd->present = 1;
- k++;
- } else
- pi_release(cd->pi);
- }
- }
- if (k)
- return 0;
-
- printk("%s: No CD-ROM drive found\n", name);
- for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
- if (!cd->disk)
- continue;
- blk_cleanup_disk(cd->disk);
- blk_mq_free_tag_set(&cd->tag_set);
- }
- pi_unregister_driver(par_drv);
- return -1;
+ return 0;
}
/* I/O request processing */
@@ -999,43 +891,121 @@ static int pcd_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
return 0;
}
+static int pcd_init_unit(struct pcd_unit *cd, bool autoprobe, int port,
+ int mode, int unit, int protocol, int delay, int ms)
+{
+ struct gendisk *disk;
+ int ret;
+
+ ret = blk_mq_alloc_sq_tag_set(&cd->tag_set, &pcd_mq_ops, 1,
+ BLK_MQ_F_SHOULD_MERGE);
+ if (ret)
+ return ret;
+
+ disk = blk_mq_alloc_disk(&cd->tag_set, cd);
+ if (IS_ERR(disk)) {
+ ret = PTR_ERR(disk);
+ goto out_free_tag_set;
+ }
+
+ INIT_LIST_HEAD(&cd->rq_list);
+ blk_queue_bounce_limit(disk->queue, BLK_BOUNCE_HIGH);
+ cd->disk = disk;
+ cd->pi = &cd->pia;
+ cd->present = 0;
+ cd->last_sense = 0;
+ cd->changed = 1;
+ cd->drive = (*drives[cd - pcd])[D_SLV];
+
+ cd->name = &cd->info.name[0];
+ snprintf(cd->name, sizeof(cd->info.name), "%s%d", name, unit);
+ cd->info.ops = &pcd_dops;
+ cd->info.handle = cd;
+ cd->info.speed = 0;
+ cd->info.capacity = 1;
+ cd->info.mask = 0;
+ disk->major = major;
+ disk->first_minor = unit;
+ disk->minors = 1;
+ strcpy(disk->disk_name, cd->name); /* umm... */
+ disk->fops = &pcd_bdops;
+ disk->flags = GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
+ disk->events = DISK_EVENT_MEDIA_CHANGE;
+
+ if (!pi_init(cd->pi, autoprobe, port, mode, unit, protocol, delay,
+ pcd_buffer, PI_PCD, verbose, cd->name))
+ goto out_free_disk;
+ if (pcd_probe(cd, ms))
+ goto out_pi_release;
+
+ cd->present = 1;
+ pcd_probe_capabilities(cd);
+ register_cdrom(cd->disk, &cd->info);
+ add_disk(cd->disk);
+ return 0;
+
+out_pi_release:
+ pi_release(cd->pi);
+out_free_disk:
+ blk_cleanup_disk(cd->disk);
+out_free_tag_set:
+ blk_mq_free_tag_set(&cd->tag_set);
+ return ret;
+}
+
static int __init pcd_init(void)
{
- struct pcd_unit *cd;
- int unit;
+ int found = 0, unit;
if (disable)
return -EINVAL;
- pcd_init_units();
+ if (register_blkdev(major, name))
+ return -EBUSY;
- if (pcd_detect())
- return -ENODEV;
+ pr_info("%s: %s version %s, major %d, nice %d\n",
+ name, name, PCD_VERSION, major, nice);
- /* get the atapi capabilities page */
- pcd_probe_capabilities();
+ par_drv = pi_register_driver(name);
+ if (!par_drv) {
+ pr_err("failed to register %s driver\n", name);
+ goto out_unregister_blkdev;
+ }
- if (register_blkdev(major, name)) {
- for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
- if (!cd->disk)
- continue;
+ for (unit = 0; unit < PCD_UNITS; unit++) {
+ if ((*drives[unit])[D_PRT])
+ pcd_drive_count++;
+ }
- blk_cleanup_queue(cd->disk->queue);
- blk_mq_free_tag_set(&cd->tag_set);
- put_disk(cd->disk);
+ if (pcd_drive_count == 0) { /* nothing spec'd - so autoprobe for 1 */
+ if (!pcd_init_unit(pcd, 1, -1, -1, -1, -1, -1, -1))
+ found++;
+ } else {
+ for (unit = 0; unit < PCD_UNITS; unit++) {
+ struct pcd_unit *cd = &pcd[unit];
+ int *conf = *drives[unit];
+
+ if (!conf[D_PRT])
+ continue;
+ if (!pcd_init_unit(cd, 0, conf[D_PRT], conf[D_MOD],
+ conf[D_UNI], conf[D_PRO], conf[D_DLY],
+ conf[D_SLV]))
+ found++;
}
- return -EBUSY;
}
- for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
- if (cd->present) {
- register_cdrom(cd->disk, &cd->info);
- cd->disk->private_data = cd;
- add_disk(cd->disk);
- }
+ if (!found) {
+ pr_info("%s: No CD-ROM drive found\n", name);
+ goto out_unregister_pi_driver;
}
return 0;
+
+out_unregister_pi_driver:
+ pi_unregister_driver(par_drv);
+out_unregister_blkdev:
+ unregister_blkdev(major, name);
+ return -ENODEV;
}
static void __exit pcd_exit(void)
@@ -1044,20 +1014,18 @@ static void __exit pcd_exit(void)
int unit;
for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
- if (!cd->disk)
+ if (!cd->present)
continue;
- if (cd->present) {
- del_gendisk(cd->disk);
- pi_release(cd->pi);
- unregister_cdrom(&cd->info);
- }
- blk_cleanup_queue(cd->disk->queue);
+ del_gendisk(cd->disk);
+ pi_release(cd->pi);
+ unregister_cdrom(&cd->info);
+ blk_cleanup_disk(cd->disk);
+
blk_mq_free_tag_set(&cd->tag_set);
- put_disk(cd->disk);
}
- unregister_blkdev(major, name);
pi_unregister_driver(par_drv);
+ unregister_blkdev(major, name);
}
MODULE_LICENSE("GPL");
--
2.30.2
We never checked for errors on add_disk() as this function
returned void. Now that this is fixed, use the shiny new
error handling.
Signed-off-by: Luis Chamberlain <[email protected]>
---
drivers/block/aoe/aoeblk.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c
index 06b360f7123a..e436b0e8eff5 100644
--- a/drivers/block/aoe/aoeblk.c
+++ b/drivers/block/aoe/aoeblk.c
@@ -417,7 +417,9 @@ aoeblk_gdalloc(void *vp)
spin_unlock_irqrestore(&d->lock, flags);
- device_add_disk(NULL, gd, aoe_attr_groups);
+ err = device_add_disk(NULL, gd, aoe_attr_groups);
+ if (err)
+ goto out_disk_cleanup;
aoedisk_add_debugfs(d);
spin_lock_irqsave(&d->lock, flags);
@@ -426,6 +428,8 @@ aoeblk_gdalloc(void *vp)
spin_unlock_irqrestore(&d->lock, flags);
return;
+out_disk_cleanup:
+ blk_cleanup_disk(gd);
err_tagset:
blk_mq_free_tag_set(set);
err_mempool:
--
2.30.2
We first register cdrom and then we add_disk() and
so we we should likewise unregister the cdrom first and
then del_gendisk().
Signed-off-by: Luis Chamberlain <[email protected]>
---
drivers/block/paride/pcd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/block/paride/pcd.c b/drivers/block/paride/pcd.c
index a7fab3830d7b..82a654fc4db8 100644
--- a/drivers/block/paride/pcd.c
+++ b/drivers/block/paride/pcd.c
@@ -1021,9 +1021,9 @@ static void __exit pcd_exit(void)
if (!cd->present)
continue;
+ unregister_cdrom(&cd->info);
del_gendisk(cd->disk);
pi_release(cd->pi);
- unregister_cdrom(&cd->info);
blk_cleanup_disk(cd->disk);
blk_mq_free_tag_set(&cd->tag_set);
--
2.30.2
From: Christoph Hellwig <[email protected]>
Refactor the pf initialization to have a dedicated helper to initialize
a single disk.
Signed-off-by: Christoph Hellwig <[email protected]>
---
drivers/block/paride/pd.c | 140 +++++++++++++++++++-------------------
1 file changed, 70 insertions(+), 70 deletions(-)
diff --git a/drivers/block/paride/pd.c b/drivers/block/paride/pd.c
index 675327df6aff..500b89a4bdaf 100644
--- a/drivers/block/paride/pd.c
+++ b/drivers/block/paride/pd.c
@@ -875,9 +875,27 @@ static const struct blk_mq_ops pd_mq_ops = {
.queue_rq = pd_queue_rq,
};
-static void pd_probe_drive(struct pd_unit *disk)
+static int pd_probe_drive(struct pd_unit *disk, int autoprobe, int port,
+ int mode, int unit, int protocol, int delay)
{
+ int index = disk - pd;
+ int *parm = *drives[index];
struct gendisk *p;
+ int ret;
+
+ disk->pi = &disk->pia;
+ disk->access = 0;
+ disk->changed = 1;
+ disk->capacity = 0;
+ disk->drive = parm[D_SLV];
+ snprintf(disk->name, PD_NAMELEN, "%s%c", name, 'a' + index);
+ disk->alt_geom = parm[D_GEO];
+ disk->standby = parm[D_SBY];
+ INIT_LIST_HEAD(&disk->rq_list);
+
+ if (!pi_init(disk->pi, autoprobe, port, mode, unit, protocol, delay,
+ pd_scratch, PI_PD, verbose, disk->name))
+ return -ENXIO;
memset(&disk->tag_set, 0, sizeof(disk->tag_set));
disk->tag_set.ops = &pd_mq_ops;
@@ -887,14 +905,14 @@ static void pd_probe_drive(struct pd_unit *disk)
disk->tag_set.queue_depth = 2;
disk->tag_set.numa_node = NUMA_NO_NODE;
disk->tag_set.flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_BLOCKING;
-
- if (blk_mq_alloc_tag_set(&disk->tag_set))
- return;
+ ret = blk_mq_alloc_tag_set(&disk->tag_set);
+ if (ret)
+ goto pi_release;
p = blk_mq_alloc_disk(&disk->tag_set, disk);
if (IS_ERR(p)) {
- blk_mq_free_tag_set(&disk->tag_set);
- return;
+ ret = PTR_ERR(p);
+ goto free_tag_set;
}
disk->gd = p;
@@ -905,102 +923,84 @@ static void pd_probe_drive(struct pd_unit *disk)
p->minors = 1 << PD_BITS;
p->events = DISK_EVENT_MEDIA_CHANGE;
p->private_data = disk;
-
blk_queue_max_hw_sectors(p->queue, cluster);
blk_queue_bounce_limit(p->queue, BLK_BOUNCE_HIGH);
if (disk->drive == -1) {
- for (disk->drive = 0; disk->drive <= 1; disk->drive++)
- if (pd_special_command(disk, pd_identify) == 0)
- return;
- } else if (pd_special_command(disk, pd_identify) == 0)
- return;
- disk->gd = NULL;
+ for (disk->drive = 0; disk->drive <= 1; disk->drive++) {
+ ret = pd_special_command(disk, pd_identify);
+ if (ret == 0)
+ break;
+ }
+ } else {
+ ret = pd_special_command(disk, pd_identify);
+ }
+ if (ret)
+ goto put_disk;
+ set_capacity(disk->gd, disk->capacity);
+ add_disk(disk->gd);
+ return 0;
+put_disk:
put_disk(p);
+ disk->gd = NULL;
+free_tag_set:
+ blk_mq_free_tag_set(&disk->tag_set);
+pi_release:
+ pi_release(disk->pi);
+ return ret;
}
-static int pd_detect(void)
+static int __init pd_init(void)
{
int found = 0, unit, pd_drive_count = 0;
struct pd_unit *disk;
- for (unit = 0; unit < PD_UNITS; unit++) {
- int *parm = *drives[unit];
- struct pd_unit *disk = pd + unit;
- disk->pi = &disk->pia;
- disk->access = 0;
- disk->changed = 1;
- disk->capacity = 0;
- disk->drive = parm[D_SLV];
- snprintf(disk->name, PD_NAMELEN, "%s%c", name, 'a'+unit);
- disk->alt_geom = parm[D_GEO];
- disk->standby = parm[D_SBY];
- if (parm[D_PRT])
- pd_drive_count++;
- INIT_LIST_HEAD(&disk->rq_list);
- }
+ if (disable)
+ return -ENODEV;
+
+ if (register_blkdev(major, name))
+ return -ENODEV;
+
+ printk("%s: %s version %s, major %d, cluster %d, nice %d\n",
+ name, name, PD_VERSION, major, cluster, nice);
par_drv = pi_register_driver(name);
if (!par_drv) {
pr_err("failed to register %s driver\n", name);
- return -1;
+ goto out_unregister_blkdev;
}
- if (pd_drive_count == 0) { /* nothing spec'd - so autoprobe for 1 */
- disk = pd;
- if (pi_init(disk->pi, 1, -1, -1, -1, -1, -1, pd_scratch,
- PI_PD, verbose, disk->name)) {
- pd_probe_drive(disk);
- if (!disk->gd)
- pi_release(disk->pi);
- }
+ for (unit = 0; unit < PD_UNITS; unit++) {
+ int *parm = *drives[unit];
+ if (parm[D_PRT])
+ pd_drive_count++;
+ }
+
+ if (pd_drive_count == 0) { /* nothing spec'd - so autoprobe for 1 */
+ if (!pd_probe_drive(pd, 1, -1, -1, -1, -1, -1))
+ found++;
} else {
for (unit = 0, disk = pd; unit < PD_UNITS; unit++, disk++) {
int *parm = *drives[unit];
if (!parm[D_PRT])
continue;
- if (pi_init(disk->pi, 0, parm[D_PRT], parm[D_MOD],
- parm[D_UNI], parm[D_PRO], parm[D_DLY],
- pd_scratch, PI_PD, verbose, disk->name)) {
- pd_probe_drive(disk);
- if (!disk->gd)
- pi_release(disk->pi);
- }
- }
- }
- for (unit = 0, disk = pd; unit < PD_UNITS; unit++, disk++) {
- if (disk->gd) {
- set_capacity(disk->gd, disk->capacity);
- add_disk(disk->gd);
- found = 1;
+ if (!pd_probe_drive(disk, 0, parm[D_PRT], parm[D_MOD],
+ parm[D_UNI], parm[D_PRO], parm[D_DLY]))
+ found++;
}
}
if (!found) {
printk("%s: no valid drive found\n", name);
- pi_unregister_driver(par_drv);
+ goto out_pi_unregister_driver;
}
- return found;
-}
-
-static int __init pd_init(void)
-{
- if (disable)
- goto out1;
-
- if (register_blkdev(major, name))
- goto out1;
-
- printk("%s: %s version %s, major %d, cluster %d, nice %d\n",
- name, name, PD_VERSION, major, cluster, nice);
- if (!pd_detect())
- goto out2;
return 0;
-out2:
+out_pi_unregister_driver:
+ pi_unregister_driver(par_drv);
+out_unregister_blkdev:
unregister_blkdev(major, name);
-out1:
return -ENODEV;
}
--
2.30.2
We never checked for errors on add_disk() as this function
returned void. Now that this is fixed, use the shiny new
error handling.
Signed-off-by: Luis Chamberlain <[email protected]>
---
drivers/block/n64cart.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/block/n64cart.c b/drivers/block/n64cart.c
index 26798da661bd..35aa5d38f57d 100644
--- a/drivers/block/n64cart.c
+++ b/drivers/block/n64cart.c
@@ -117,6 +117,7 @@ static const struct block_device_operations n64cart_fops = {
static int __init n64cart_probe(struct platform_device *pdev)
{
struct gendisk *disk;
+ int err = -ENOMEM;
if (!start || !size) {
pr_err("start or size not specified\n");
@@ -134,7 +135,7 @@ static int __init n64cart_probe(struct platform_device *pdev)
disk = blk_alloc_disk(NUMA_NO_NODE);
if (!disk)
- return -ENOMEM;
+ goto out;
disk->first_minor = 0;
disk->flags = GENHD_FL_NO_PART_SCAN;
@@ -149,11 +150,18 @@ static int __init n64cart_probe(struct platform_device *pdev)
blk_queue_physical_block_size(disk->queue, 4096);
blk_queue_logical_block_size(disk->queue, 4096);
- add_disk(disk);
+ err = add_disk(disk);
+ if (err)
+ goto out_cleanup_disk;
pr_info("n64cart: %u kb disk\n", size / 1024);
return 0;
+
+out_cleanup_disk:
+ blk_cleanup_disk(disk);
+out:
+ return err;
}
static struct platform_driver n64cart_driver = {
--
2.30.2
On 9/27/21 4:00 PM, Luis Chamberlain wrote:
> This is the 2nd version of the third batch of driver conversions for the
> add_disk() error handling. This and the entire 7th series of driver
> conversions can be found on my 20210927-for-axboe-add-disk-error-handling
> branch [0].
Applied 2, 4, 7, 8-15.
--
Jens Axboe