wifi: brcmfmac: unmap dma buffer in brcmf_msgbuf_alloc_pktid()

stable inclusion
from stable-v5.10.173
commit b4b4447481dbdffb0220632b4ba3be397b1d2676
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8BFR3

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=b4b4447481dbdffb0220632b4ba3be397b1d2676



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[ Upstream commit b9f42003 ]

After the DMA buffer is mapped to a physical address, address is stored
in pktids in brcmf_msgbuf_alloc_pktid(). Then, pktids is parsed in
brcmf_msgbuf_get_pktid()/brcmf_msgbuf_release_array() to obtain physaddr
and later unmap the DMA buffer. But when count is always equal to
pktids->array_size, physaddr isn't stored in pktids and the DMA buffer
will not be unmapped anyway.

Fixes: 9a1bb602 ("brcmfmac: Adding msgbuf protocol.")
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20221207013114.1748936-1-shaozhengchao@huawei.com


Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: sanglipeng <sanglipeng1@jd.com>