mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-07-22 02:17:36 -04:00
Code Issues Packages Projects Releases Wiki Activity

dmaengine: sh: rz-dmac: Fix incorrect NULL check for list_first_entry()

Browse Source 
list_first_entry() does not return NULL when the list is empty,
making the existing NULL check invalid. Use list_first_entry_or_null()
instead.

Fixes: 21323b118c ("dmaengine: sh: rz-dmac: Add device_tx_status() callback")
Cc: stable@vger.kernel.org
Tested-by: John Madieu <john.madieu.xa@bp.renesas.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Tested-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Link: https://patch.msgid.link/20260526084710.3491480-3-claudiu.beznea@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Claudiu Beznea
2026-05-26 11:46:54 +03:00
committed by Vinod Koul
parent 731712403d
commit 5fbf3a2a3b
1 changed files with 2 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/dma/sh/rz-dmac.c
View File

@@ -723,8 +723,8 @@ static u32 rz_dmac_chan_get_residue(struct rz_dmac_chan *channel,
u32 crla, crtb, i;
/* Get current processing virtual descriptor */
current_desc = list_first_entry(&channel->ld_active,
struct rz_dmac_desc, node);
current_desc = list_first_entry_or_null(&channel->ld_active,
struct rz_dmac_desc, node);
if (!current_desc)
return 0;