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author | Alex Elder <elder@linaro.org> | 2021-06-10 14:23:01 -0500 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2021-06-10 14:50:08 -0700 |
commit | 8cc7ebbf5f6e8ca825dba4d0180329857c997c40 (patch) | |
tree | a7f5d0bc43cae81ff1180d385bab3c5eb348d70c /drivers | |
parent | 53f8b1b25419a14b784feb6706bfe5bac03c5a75 (diff) | |
download | linux-stable-8cc7ebbf5f6e8ca825dba4d0180329857c997c40.tar.gz linux-stable-8cc7ebbf5f6e8ca825dba4d0180329857c997c40.tar.bz2 linux-stable-8cc7ebbf5f6e8ca825dba4d0180329857c997c40.zip |
net: ipa: don't assume mem array indexed by ID
Change ipa_mem_valid() to iterate over the entries using a u32 index
variable rather than using a memory region ID. Use the ID found
inside the memory descriptor rather than the loop index.
Change ipa_mem_size_valid() to iterate over the entries but without
assuming the array index is the memory region ID. "Empty" entries
will have zero size; and we'll temporarily assume such entries have
zero offset as well (they all do, currently).
Similarly, don't assume the mem[] array is indexed by ID in
ipa_mem_config(). There, "empty" entries will have a zero canary
count, so no special assumptions are needed to handle them correctly.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/net/ipa/ipa_mem.c | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/drivers/net/ipa/ipa_mem.c b/drivers/net/ipa/ipa_mem.c index ef9fdd3b8875..9e504ec27817 100644 --- a/drivers/net/ipa/ipa_mem.c +++ b/drivers/net/ipa/ipa_mem.c @@ -220,6 +220,7 @@ static bool ipa_mem_valid(struct ipa *ipa, const struct ipa_mem_data *mem_data) DECLARE_BITMAP(regions, IPA_MEM_COUNT) = { }; struct device *dev = &ipa->pdev->dev; enum ipa_mem_id mem_id; + u32 i; if (mem_data->local_count > IPA_MEM_COUNT) { dev_err(dev, "too many memory regions (%u > %u)\n", @@ -227,10 +228,10 @@ static bool ipa_mem_valid(struct ipa *ipa, const struct ipa_mem_data *mem_data) return false; } - for (mem_id = 0; mem_id < mem_data->local_count; mem_id++) { - const struct ipa_mem *mem = &mem_data->local[mem_id]; + for (i = 0; i < mem_data->local_count; i++) { + const struct ipa_mem *mem = &mem_data->local[i]; - if (mem_id == IPA_MEM_UNDEFINED) + if (mem->id == IPA_MEM_UNDEFINED) continue; if (__test_and_set_bit(mem->id, regions)) { @@ -248,7 +249,7 @@ static bool ipa_mem_valid(struct ipa *ipa, const struct ipa_mem_data *mem_data) /* It's harmless, but warn if an offset is provided */ if (mem->offset) dev_warn(dev, "empty region %u has non-zero offset\n", - mem_id); + mem->id); } /* Now see if any required regions are not defined */ @@ -268,16 +269,16 @@ static bool ipa_mem_size_valid(struct ipa *ipa) { struct device *dev = &ipa->pdev->dev; u32 limit = ipa->mem_size; - enum ipa_mem_id mem_id; + u32 i; - for (mem_id = 0; mem_id < ipa->mem_count; mem_id++) { - const struct ipa_mem *mem = &ipa->mem[mem_id]; + for (i = 0; i < ipa->mem_count; i++) { + const struct ipa_mem *mem = &ipa->mem[i]; if (mem->offset + mem->size <= limit) continue; dev_err(dev, "region %u ends beyond memory limit (0x%08x)\n", - mem_id, limit); + mem->id, limit); return false; } @@ -294,11 +295,11 @@ static bool ipa_mem_size_valid(struct ipa *ipa) int ipa_mem_config(struct ipa *ipa) { struct device *dev = &ipa->pdev->dev; - enum ipa_mem_id mem_id; dma_addr_t addr; u32 mem_size; void *virt; u32 val; + u32 i; /* Check the advertised location and size of the shared memory area */ val = ioread32(ipa->reg_virt + IPA_REG_SHARED_MEM_SIZE_OFFSET); @@ -330,11 +331,11 @@ int ipa_mem_config(struct ipa *ipa) ipa->zero_virt = virt; ipa->zero_size = IPA_MEM_MAX; - /* For each region, write "canary" values in the space prior to - * the region's base address if indicated. + /* For each defined region, write "canary" values in the + * space prior to the region's base address if indicated. */ - for (mem_id = 0; mem_id < ipa->mem_count; mem_id++) { - const struct ipa_mem *mem = &ipa->mem[mem_id]; + for (i = 0; i < ipa->mem_count; i++) { + const struct ipa_mem *mem = &ipa->mem[i]; u16 canary_count; __le32 *canary; |