diff options
| author | Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2021-01-16 22:21:46 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-03 16:44:17 +0100 |
| commit | b9df8a3fca610856028e5d7a1936d85d0486314e (patch) | |
| tree | a073d03f0e1f05003aba9f73edbd270ed94413a4 /drivers/media | |
| parent | e601efd031d8e5594de0981f73de300cb7339838 (diff) | |
media: cx25821: Fix a bug when reallocating some dma memory
[ Upstream commit b2de3643c5024fc4fd128ba7767c7fb8b714bea7 ]
This function looks like a realloc.
However, if 'risc->cpu != NULL', the memory will be freed, but never
reallocated with the bigger 'size'.
Explicitly set 'risc->cpu' to NULL, so that the reallocation is
correctly performed a few lines below.
[hverkuil: NULL != risc->cpu -> risc->cpu]
Fixes: 5ede94c70553 ("[media] cx25821: remove bogus btcx_risc dependency)
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/pci/cx25821/cx25821-core.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/media/pci/cx25821/cx25821-core.c b/drivers/media/pci/cx25821/cx25821-core.c index 54398d8a4696..b43cf85ed5f0 100644 --- a/drivers/media/pci/cx25821/cx25821-core.c +++ b/drivers/media/pci/cx25821/cx25821-core.c @@ -990,8 +990,10 @@ int cx25821_riscmem_alloc(struct pci_dev *pci, __le32 *cpu; dma_addr_t dma = 0; - if (NULL != risc->cpu && risc->size < size) + if (risc->cpu && risc->size < size) { pci_free_consistent(pci, risc->size, risc->cpu, risc->dma); + risc->cpu = NULL; + } if (NULL == risc->cpu) { cpu = pci_zalloc_consistent(pci, size, &dma); if (NULL == cpu) |