dmaengine: pxa_dma: Remove an erroneous BUG_ON() in pxad_free_desc()
authorChristophe JAILLET <christophe.jaillet@wanadoo.fr>
Sat, 7 Oct 2023 11:13:09 +0000 (13:13 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 20 Nov 2023 10:59:26 +0000 (11:59 +0100)
commitca2294c1275ab57bd27d0a279ea0c8ed9fc0a029
treed47b3fd4ac30b9e17832d2af2f88e9b9c17e5671
parent0976757a5a57a050018af8c7af84c317f96cffed
dmaengine: pxa_dma: Remove an erroneous BUG_ON() in pxad_free_desc()

[ Upstream commit 83c761f568733277ce1f7eb9dc9e890649c29a8c ]

If pxad_alloc_desc() fails on the first dma_pool_alloc() call, then
sw_desc->nb_desc is zero.
In such a case pxad_free_desc() is called and it will BUG_ON().

Remove this erroneous BUG_ON().

It is also useless, because if "sw_desc->nb_desc == 0", then, on the first
iteration of the for loop, i is -1 and the loop will not be executed.
(both i and sw_desc->nb_desc are 'int')

Fixes: a57e16cf0333 ("dmaengine: pxa: add pxa dmaengine driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/c8fc5563c9593c914fde41f0f7d1489a21b45a9a.1696676782.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/dma/pxa_dma.c