4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Alamy Liu <alamy.liu@xxxxxxxxx>
commit d07e9fadf3a6b466ca3ae90fa4859089ff20530f upstream.
Free up the allocated memory in the case of error return
The value of mmc_host->cqe_enabled stays 'false'. Thus, cqhci_disable
(mmc_cqe_ops->cqe_disable) won't be called to free the memory. Also,
cqhci_disable() seems to be designed to disable and free all resources, not
suitable to handle this corner case.
Fixes: a4080225f51d ("mmc: cqhci: support for command queue enabled host")
Signed-off-by: Alamy Liu <alamy.liu@xxxxxxxxx>
Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/mmc/host/cqhci.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
--- a/drivers/mmc/host/cqhci.c
+++ b/drivers/mmc/host/cqhci.c
@@ -217,12 +217,21 @@ static int cqhci_host_alloc_tdl(struct c
cq_host->desc_size,
&cq_host->desc_dma_base,
GFP_KERNEL);
+ if (!cq_host->desc_base)
+ return -ENOMEM;
+
cq_host->trans_desc_base = dmam_alloc_coherent(mmc_dev(cq_host->mmc),
cq_host->data_size,
&cq_host->trans_desc_dma_base,
GFP_KERNEL);
- if (!cq_host->desc_base || !cq_host->trans_desc_base)
+ if (!cq_host->trans_desc_base) {
+ dmam_free_coherent(mmc_dev(cq_host->mmc), cq_host->desc_size,
+ cq_host->desc_base,
+ cq_host->desc_dma_base);
+ cq_host->desc_base = NULL;
+ cq_host->desc_dma_base = 0;
return -ENOMEM;
+ }
pr_debug("%s: cqhci: desc-base: 0x%p trans-base: 0x%p\n desc_dma 0x%llx trans_dma: 0x%llx\n",
mmc_hostname(cq_host->mmc), cq_host->desc_base, cq_host->trans_desc_base,
