2022-03-25 12:16:41

by Jakob Koschel

Subject: [PATCH] sh: replace usage of found with dedicated list iterator variable

To move the list iterator variable into the list_for_each_entry_*()
macro in the future it should be avoided to use the list iterator
variable after the loop body.

To *never* use the list iterator variable after the loop it was
concluded to use a separate iterator variable instead of a
found boolean [1].

This removes the need to use a found variable and simply checking if
the variable was set, can determine if the break/goto was hit.

Link: https://lore.kernel.org/all/CAHk-=wgRr_D8CB-D9Kg-c=EHreAsk5SqXPwr9Y7k9sA6cWXJ6w@mail.gmail.com/
Signed-off-by: Jakob Koschel <[email protected]>
---
arch/sh/drivers/dma/dma-api.c | 22 ++++++++++------------
1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/arch/sh/drivers/dma/dma-api.c b/arch/sh/drivers/dma/dma-api.c
index ab9170494dcc..b1a54269b03c 100644
--- a/arch/sh/drivers/dma/dma-api.c
+++ b/arch/sh/drivers/dma/dma-api.c
@@ -127,20 +127,19 @@ static int search_cap(const char **haystack, const char *needle)
*/
int request_dma_bycap(const char **dmac, const char **caps, const char *dev_id)
{
- unsigned int found = 0;
- struct dma_info *info;
+ struct dma_info *info = NULL, *iter;
const char **p;
int i;

BUG_ON(!dmac || !caps);

- list_for_each_entry(info, &registered_dmac_list, list)
- if (strcmp(*dmac, info->name) == 0) {
- found = 1;
+ list_for_each_entry(iter, &registered_dmac_list, list)
+ if (strcmp(*dmac, iter->name) == 0) {
+ info = iter;
break;
}

- if (!found)
+ if (!info)
return -ENODEV;

for (i = 0; i < info->nr_channels; i++) {
@@ -242,17 +241,16 @@ EXPORT_SYMBOL(dma_wait_for_completion);

int register_chan_caps(const char *dmac, struct dma_chan_caps *caps)
{
- struct dma_info *info;
- unsigned int found = 0;
+ struct dma_info *info = NULL, *iter;
int i;

- list_for_each_entry(info, &registered_dmac_list, list)
- if (strcmp(dmac, info->name) == 0) {
- found = 1;
+ list_for_each_entry(iter, &registered_dmac_list, list)
+ if (strcmp(dmac, iter->name) == 0) {
+ info = iter;
break;
}

- if (unlikely(!found))
+ if (unlikely(!info))
return -ENODEV;

for (i = 0; i < info->nr_channels; i++, caps++) {

base-commit: f443e374ae131c168a065ea1748feac6b2e76613
--
2.25.1