2019-10-12 10:31:03

by Vasily Gorbik

Subject: [GIT PULL] s390 updates for 5.4-rc3

Hello Linus,

please pull s390 changes for 5.4-rc3.

Thank you,
Vasily

The following changes since commit da0c9ea146cbe92b832f1b0f694840ea8eb33cce:

Linux 5.4-rc2 (2019-10-06 14:27:30 -0700)

are available in the Git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git tags/s390-5.4-4

for you to fetch changes up to 062795fcdcb2d22822fb42644b1d76a8ad8439b3:

s390/uaccess: avoid (false positive) compiler warnings (2019-10-11 12:27:25 +0200)

----------------------------------------------------------------
s390 updates for 5.4-rc3

- Fix virtio-ccw DMA regression.

- Fix compiler warnings in uaccess.

----------------------------------------------------------------
Christian Borntraeger (1):
s390/uaccess: avoid (false positive) compiler warnings

Halil Pasic (1):
s390/cio: fix virtio-ccw DMA without PV

arch/s390/include/asm/uaccess.h | 4 ++--
drivers/s390/cio/cio.h | 1 +
drivers/s390/cio/css.c | 7 ++++++-
drivers/s390/cio/device.c | 2 +-
4 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/arch/s390/include/asm/uaccess.h b/arch/s390/include/asm/uaccess.h
index bd2fd9a7821d..a470f1fa9f2a 100644
--- a/arch/s390/include/asm/uaccess.h
+++ b/arch/s390/include/asm/uaccess.h
@@ -83,7 +83,7 @@ raw_copy_to_user(void __user *to, const void *from, unsigned long n);
__rc; \
})

-static inline int __put_user_fn(void *x, void __user *ptr, unsigned long size)
+static __always_inline int __put_user_fn(void *x, void __user *ptr, unsigned long size)
{
unsigned long spec = 0x010000UL;
int rc;
@@ -113,7 +113,7 @@ static inline int __put_user_fn(void *x, void __user *ptr, unsigned long size)
return rc;
}

-static inline int __get_user_fn(void *x, const void __user *ptr, unsigned long size)
+static __always_inline int __get_user_fn(void *x, const void __user *ptr, unsigned long size)
{
unsigned long spec = 0x01UL;
int rc;
diff --git a/drivers/s390/cio/cio.h b/drivers/s390/cio/cio.h
index ba7d2480613b..dcdaba689b20 100644
--- a/drivers/s390/cio/cio.h
+++ b/drivers/s390/cio/cio.h
@@ -113,6 +113,7 @@ struct subchannel {
enum sch_todo todo;
struct work_struct todo_work;
struct schib_config config;
+ u64 dma_mask;
char *driver_override; /* Driver name to force a match */
} __attribute__ ((aligned(8)));

diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index 1fbfb0a93f5f..831850435c23 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -232,7 +232,12 @@ struct subchannel *css_alloc_subchannel(struct subchannel_id schid,
* belong to a subchannel need to fit 31 bit width (e.g. ccw).
*/
sch->dev.coherent_dma_mask = DMA_BIT_MASK(31);
- sch->dev.dma_mask = &sch->dev.coherent_dma_mask;
+ /*
+ * But we don't have such restrictions imposed on the stuff that
+ * is handled by the streaming API.
+ */
+ sch->dma_mask = DMA_BIT_MASK(64);
+ sch->dev.dma_mask = &sch->dma_mask;
return sch;

err:
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 131430bd48d9..0c6245fc7706 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -710,7 +710,7 @@ static struct ccw_device * io_subchannel_allocate_dev(struct subchannel *sch)
if (!cdev->private)
goto err_priv;
cdev->dev.coherent_dma_mask = sch->dev.coherent_dma_mask;
- cdev->dev.dma_mask = &cdev->dev.coherent_dma_mask;
+ cdev->dev.dma_mask = sch->dev.dma_mask;
dma_pool = cio_gp_dma_create(&cdev->dev, 1);
if (!dma_pool)
goto err_dma_pool;

2019-10-12 21:40:35

by pr-tracker-bot

Subject: Re: [GIT PULL] s390 updates for 5.4-rc3

The pull request you sent on Sat, 12 Oct 2019 12:25:39 +0200:

> git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git tags/s390-5.4-4

has been merged into torvalds/linux.git:
https://git.kernel.org/torvalds/c/f154988a905e5cad9d1a20d4c4aeb176968fe3be

Thank you!

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