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| author | Leonardo Bras <leobras.c@gmail.com> | 2021-08-17 03:39:22 -0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-08-27 00:56:54 +1000 |
| commit | 92a23219299cedde52e3298788484f4875d5ce0f (patch) | |
| tree | 494c17bf5b3d1f367af19d8ef5e0d2f29e4757f6 /arch/powerpc | |
| parent | 4ff8677a0b192a58d998d1d34fc5168203041a24 (diff) | |
| download | lwn-92a23219299cedde52e3298788484f4875d5ce0f.tar.gz lwn-92a23219299cedde52e3298788484f4875d5ce0f.zip | |
powerpc/pseries/iommu: Add ddw_list_new_entry() helper
There are two functions creating direct_window_list entries in a
similar way, so create a ddw_list_new_entry() to avoid duplicity and
simplify those functions.
Signed-off-by: Leonardo Bras <leobras.c@gmail.com>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210817063929.38701-5-leobras.c@gmail.com
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/platforms/pseries/iommu.c | 32 |
1 files changed, 21 insertions, 11 deletions
diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c index 33d82865d6e6..712d1667144a 100644 --- a/arch/powerpc/platforms/pseries/iommu.c +++ b/arch/powerpc/platforms/pseries/iommu.c @@ -874,6 +874,21 @@ static u64 find_existing_ddw(struct device_node *pdn, int *window_shift) return dma_addr; } +static struct direct_window *ddw_list_new_entry(struct device_node *pdn, + const struct dynamic_dma_window_prop *dma64) +{ + struct direct_window *window; + + window = kzalloc(sizeof(*window), GFP_KERNEL); + if (!window) + return NULL; + + window->device = pdn; + window->prop = dma64; + + return window; +} + static int find_existing_ddw_windows(void) { int len; @@ -886,18 +901,15 @@ static int find_existing_ddw_windows(void) for_each_node_with_property(pdn, DIRECT64_PROPNAME) { direct64 = of_get_property(pdn, DIRECT64_PROPNAME, &len); - if (!direct64) - continue; - - window = kzalloc(sizeof(*window), GFP_KERNEL); - if (!window || len < sizeof(struct dynamic_dma_window_prop)) { - kfree(window); + if (!direct64 || len < sizeof(*direct64)) { remove_ddw(pdn, true); continue; } - window->device = pdn; - window->prop = direct64; + window = ddw_list_new_entry(pdn, direct64); + if (!window) + break; + spin_lock(&direct_window_list_lock); list_add(&window->list, &direct_window_list); spin_unlock(&direct_window_list_lock); @@ -1307,7 +1319,7 @@ static u64 enable_ddw(struct pci_dev *dev, struct device_node *pdn) dev_dbg(&dev->dev, "created tce table LIOBN 0x%x for %pOF\n", create.liobn, dn); - window = kzalloc(sizeof(*window), GFP_KERNEL); + window = ddw_list_new_entry(pdn, ddwprop); if (!window) goto out_clear_window; @@ -1326,8 +1338,6 @@ static u64 enable_ddw(struct pci_dev *dev, struct device_node *pdn) goto out_free_window; } - window->device = pdn; - window->prop = ddwprop; spin_lock(&direct_window_list_lock); list_add(&window->list, &direct_window_list); spin_unlock(&direct_window_list_lock); |