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broadcom-wl: fix wild ssb_device accesses as pci_dev for legacy pci dma api 

broadcom-wl driver bound to ssb device with ssb driver probe
have osh handle struct pdev pointer value initialized with
ssb_device pointer. Later on pdev is used with legacy pci
dma api as pci_dev thus causing oops sometimes.

The patch replaces legacy pci dma api and pass relevant
device struct pointer to avoid crashes.
Signed-off-by: George Kashperko <george@znau.edu.ua>

SVN-Revision: 26949
lede-17.01
Felix Fietkau 2011-05-19 10:08:02 +00:00
parent 7c8564d7c5
commit 2383a26168
1 changed files with 88 additions and 0 deletions
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88
package/broadcom-wl/patches/006-generic-dma-api.patch Normal file
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@ -0,0 +1,88 @@
From: George Kashperko <george@znau.edu.ua>
broadcom-wl driver bound to ssb device with ssb driver probe
have osh handle struct pdev pointer value initialized with
ssb_device pointer. Later on pdev is used with legacy pci
dma api as pci_dev thus causing oops sometimes.
The patch replaces legacy pci dma api and pass relevant
device struct pointer to avoid crashes.
Signed-off-by: George Kashperko <george@znau.edu.ua>
---
driver/linux_osl.c | 28 +++++++++++++++++++++++-----
1 file changed, 23 insertions(+), 5 deletions(-)
--- broadcom-wl-5.10.56.27.3.orig/driver/linux_osl.c 2011-05-17 23:40:00.000000000 +0300
+++ broadcom-wl-5.10.56.27.3/driver/linux_osl.c 2011-05-17 23:46:01.000000000 +0300
@@ -25,6 +25,9 @@
#include <asm/paccess.h>
#endif /* mips */
#include <pcicfg.h>
+#ifdef CONFIG_SSB
+#include <linux/ssb/ssb.h>
+#endif
#define PCI_CFG_RETRY 10
@@ -364,12 +367,27 @@ osl_dma_consistent_align(void)
return (PAGE_SIZE);
}
+static struct device *
+osl_get_dmadev(osl_t *osh)
+{
+#ifdef CONFIG_SSB
+ if (osh->bustype == SI_BUS) {
+ /* This can be SiliconBackplane emulated as pci with Broadcom or
+ * ssb device. Less harmful is to check for pci_bus_type and if
+ * no match then assume we got ssb */
+ if (((struct pci_dev *)osh->pdev)->dev.bus != &pci_bus_type)
+ return ((struct ssb_device *)osh->pdev)->dma_dev;
+ }
+#endif
+ return &((struct pci_dev *)osh->pdev)->dev;
+}
+
void*
osl_dma_alloc_consistent(osl_t *osh, uint size, ulong *pap)
{
ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC)));
- return (pci_alloc_consistent(osh->pdev, size, (dma_addr_t*)pap));
+ return (dma_alloc_coherent(osl_get_dmadev(osh), size, (dma_addr_t*)pap, GFP_ATOMIC));
}
void
@@ -377,7 +395,7 @@ osl_dma_free_consistent(osl_t *osh, void
{
ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC)));
- pci_free_consistent(osh->pdev, size, va, (dma_addr_t)pa);
+ dma_free_coherent(osl_get_dmadev(osh), size, va, (dma_addr_t)pa);
}
uint BCMFASTPATH
@@ -386,13 +404,13 @@ osl_dma_map(osl_t *osh, void *va, uint s
ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC)));
if (direction == DMA_TX)
- return (pci_map_single(osh->pdev, va, size, PCI_DMA_TODEVICE));
+ return (dma_map_single(osl_get_dmadev(osh), va, size, PCI_DMA_TODEVICE));
else {
#ifdef mips
dma_cache_inv((uint)va, size);
return (virt_to_phys(va));
#else /* mips */
- return (pci_map_single(osh->pdev, va, size, PCI_DMA_FROMDEVICE));
+ return (dma_map_single(osl_get_dmadev(osh), va, size, PCI_DMA_FROMDEVICE));
#endif /* mips */
}
}
@@ -404,7 +422,7 @@ osl_dma_unmap(osl_t *osh, uint pa, uint
ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC)));
dir = (direction == DMA_TX)? PCI_DMA_TODEVICE: PCI_DMA_FROMDEVICE;
- pci_unmap_single(osh->pdev, (uint32)pa, size, dir);
+ dma_unmap_single(osl_get_dmadev(osh), (uint32)pa, size, dir);
}