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authorThomas Bogendoerfer <tsbogend@alpha.franken.de>2017-07-03 10:38:05 +0200
committerHelge Deller <deller@gmx.de>2017-07-03 17:00:46 +0200
commit33f9e02495d15a061f0c94ef46f5103a2d0c20f3 (patch)
tree3fcc0f6afa5e86730eec9755c2d28103cad67298 /drivers/parisc
parent247462316f85a9e0479445c1a4223950b68ffac1 (diff)
parisc: DMA API: return error instead of BUG_ON for dma ops on non dma devs
Enabling parport pc driver on a B2600 (and probably other 64bit PARISC systems) produced following BUG: CPU: 0 PID: 1 Comm: swapper Not tainted 4.12.0-rc5-30198-g1132d5e #156 task: 000000009e050000 task.stack: 000000009e04c000 YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI PSW: 00001000000001101111111100001111 Not tainted r00-03 000000ff0806ff0f 000000009e04c990 0000000040871b78 000000009e04cac0 r04-07 0000000040c14de0 ffffffffffffffff 000000009e07f098 000000009d82d200 r08-11 000000009d82d210 0000000000000378 0000000000000000 0000000040c345e0 r12-15 0000000000000005 0000000040c345e0 0000000000000000 0000000040c9d5e0 r16-19 0000000040c345e0 00000000f00001c4 00000000f00001bc 0000000000000061 r20-23 000000009e04ce28 0000000000000010 0000000000000010 0000000040b89e40 r24-27 0000000000000003 0000000000ffffff 000000009d82d210 0000000040c14de0 r28-31 0000000000000000 000000009e04ca90 000000009e04cb40 0000000000000000 sr00-03 0000000000000000 0000000000000000 0000000000000000 0000000000000000 sr04-07 0000000000000000 0000000000000000 0000000000000000 0000000000000000 IASQ: 0000000000000000 0000000000000000 IAOQ: 00000000404aece0 00000000404aece4 IIR: 03ffe01f ISR: 0000000010340000 IOR: 000001781304cac8 CPU: 0 CR30: 000000009e04c000 CR31: 00000000e2976de2 ORIG_R28: 0000000000000200 IAOQ[0]: sba_dma_supported+0x80/0xd0 IAOQ[1]: sba_dma_supported+0x84/0xd0 RP(r2): parport_pc_probe_port+0x178/0x1200 Cause is a call to dma_coerce_mask_and_coherenet in parport_pc_probe_port, which PARISC DMA API doesn't handle very nicely. This commit gives back DMA_ERROR_CODE for DMA API calls, if device isn't capable of DMA transaction. Cc: <stable@vger.kernel.org> # v3.13+ Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'drivers/parisc')
-rw-r--r--drivers/parisc/ccio-dma.c12
-rw-r--r--drivers/parisc/dino.c5
-rw-r--r--drivers/parisc/lba_pci.c6
-rw-r--r--drivers/parisc/sba_iommu.c14
4 files changed, 34 insertions, 3 deletions
diff --git a/drivers/parisc/ccio-dma.c b/drivers/parisc/ccio-dma.c
index e32ca2ef9e54..56c93f096de9 100644
--- a/drivers/parisc/ccio-dma.c
+++ b/drivers/parisc/ccio-dma.c
@@ -741,6 +741,8 @@ ccio_map_single(struct device *dev, void *addr, size_t size,
BUG_ON(!dev);
ioc = GET_IOC(dev);
+ if (!ioc)
+ return DMA_ERROR_CODE;
BUG_ON(size <= 0);
@@ -814,6 +816,10 @@ ccio_unmap_page(struct device *dev, dma_addr_t iova, size_t size,
BUG_ON(!dev);
ioc = GET_IOC(dev);
+ if (!ioc) {
+ WARN_ON(!ioc);
+ return;
+ }
DBG_RUN("%s() iovp 0x%lx/%x\n",
__func__, (long)iova, size);
@@ -918,6 +924,8 @@ ccio_map_sg(struct device *dev, struct scatterlist *sglist, int nents,
BUG_ON(!dev);
ioc = GET_IOC(dev);
+ if (!ioc)
+ return 0;
DBG_RUN_SG("%s() START %d entries\n", __func__, nents);
@@ -990,6 +998,10 @@ ccio_unmap_sg(struct device *dev, struct scatterlist *sglist, int nents,
BUG_ON(!dev);
ioc = GET_IOC(dev);
+ if (!ioc) {
+ WARN_ON(!ioc);
+ return;
+ }
DBG_RUN_SG("%s() START %d entries, %p,%x\n",
__func__, nents, sg_virt(sglist), sglist->length);
diff --git a/drivers/parisc/dino.c b/drivers/parisc/dino.c
index 1133b5cc88ca..5c63b920b471 100644
--- a/drivers/parisc/dino.c
+++ b/drivers/parisc/dino.c
@@ -154,7 +154,10 @@ struct dino_device
};
/* Looks nice and keeps the compiler happy */
-#define DINO_DEV(d) ((struct dino_device *) d)
+#define DINO_DEV(d) ({ \
+ void *__pdata = d; \
+ BUG_ON(!__pdata); \
+ (struct dino_device *)__pdata; })
/*
diff --git a/drivers/parisc/lba_pci.c b/drivers/parisc/lba_pci.c
index 2ec2aef4d211..bc286cbbbc9b 100644
--- a/drivers/parisc/lba_pci.c
+++ b/drivers/parisc/lba_pci.c
@@ -111,8 +111,10 @@ static u32 lba_t32;
/* Looks nice and keeps the compiler happy */
-#define LBA_DEV(d) ((struct lba_device *) (d))
-
+#define LBA_DEV(d) ({ \
+ void *__pdata = d; \
+ BUG_ON(!__pdata); \
+ (struct lba_device *)__pdata; })
/*
** Only allow 8 subsidiary busses per LBA
diff --git a/drivers/parisc/sba_iommu.c b/drivers/parisc/sba_iommu.c
index 33385e574433..87ad5fd6a7a2 100644
--- a/drivers/parisc/sba_iommu.c
+++ b/drivers/parisc/sba_iommu.c
@@ -691,6 +691,8 @@ static int sba_dma_supported( struct device *dev, u64 mask)
return 0;
ioc = GET_IOC(dev);
+ if (!ioc)
+ return 0;
/*
* check if mask is >= than the current max IO Virt Address
@@ -722,6 +724,8 @@ sba_map_single(struct device *dev, void *addr, size_t size,
int pide;
ioc = GET_IOC(dev);
+ if (!ioc)
+ return DMA_ERROR_CODE;
/* save offset bits */
offset = ((dma_addr_t) (long) addr) & ~IOVP_MASK;
@@ -813,6 +817,10 @@ sba_unmap_page(struct device *dev, dma_addr_t iova, size_t size,
DBG_RUN("%s() iovp 0x%lx/%x\n", __func__, (long) iova, size);
ioc = GET_IOC(dev);
+ if (!ioc) {
+ WARN_ON(!ioc);
+ return;
+ }
offset = iova & ~IOVP_MASK;
iova ^= offset; /* clear offset bits */
size += offset;
@@ -952,6 +960,8 @@ sba_map_sg(struct device *dev, struct scatterlist *sglist, int nents,
DBG_RUN_SG("%s() START %d entries\n", __func__, nents);
ioc = GET_IOC(dev);
+ if (!ioc)
+ return 0;
/* Fast path single entry scatterlists. */
if (nents == 1) {
@@ -1037,6 +1047,10 @@ sba_unmap_sg(struct device *dev, struct scatterlist *sglist, int nents,
__func__, nents, sg_virt(sglist), sglist->length);
ioc = GET_IOC(dev);
+ if (!ioc) {
+ WARN_ON(!ioc);
+ return;
+ }
#ifdef SBA_COLLECT_STATS
ioc->usg_calls++;

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