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powerpc/warp: Fix error handling in pika_dtm_thread

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pika_dtm_thread() acquires client through of_find_i2c_device_by_node()
but fails to release it in error handling path. This could result in a
reference count leak, preventing proper cleanup and potentially
leading to resource exhaustion. Add put_device() to release the
reference in the error handling path.

Found by code review.

Cc: stable@vger.kernel.org
Fixes: 3984114f05 ("powerpc/warp: Platform fix for i2c change")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20251116024411.21968-1-make24@iscas.ac.cn
This commit is contained in:
Ma Ke 2025-11-16 10:44:11 +08:00 committed by Madhavan Srinivasan
parent acd1e47db0
commit 108d7f9512
1 changed files with 2 additions and 0 deletions
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2
arch/powerpc/platforms/44x/warp.c
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@ -293,6 +293,8 @@ static int pika_dtm_thread(void __iomem *fpga)
schedule_timeout(HZ);
}
put_device(&client->dev);
return 0;
}