diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2015-06-15 08:22:30 -0400 |
|---|---|---|
| committer | Jon Mason <jdmason@kudzu.us> | 2015-07-04 14:09:30 -0400 |
| commit | fd839bf88485878ec602dbb3146fd44769eb3784 (patch) | |
| tree | c19299e08d3b0d1ff0d4e69f99b53db0ef918d31 | |
| parent | 7eb387813db6730a5793cd53077b4039d948d17f (diff) | |
| download | lwn-fd839bf88485878ec602dbb3146fd44769eb3784.tar.gz lwn-fd839bf88485878ec602dbb3146fd44769eb3784.zip | |
NTB: Change WARN_ON_ONCE to pr_warn_once on unsafe
The unsafe doorbell and scratchpad access should display reason when
WARN is called. Otherwise we get a stack dump without any explanation.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
| -rw-r--r-- | drivers/ntb/hw/intel/ntb_hw_intel.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/drivers/ntb/hw/intel/ntb_hw_intel.c b/drivers/ntb/hw/intel/ntb_hw_intel.c index 70924e5c0c72..ba4dc0d7e1f3 100644 --- a/drivers/ntb/hw/intel/ntb_hw_intel.c +++ b/drivers/ntb/hw/intel/ntb_hw_intel.c @@ -246,7 +246,8 @@ static inline int ndev_db_addr(struct intel_ntb_dev *ndev, phys_addr_t *db_addr, resource_size_t *db_size, phys_addr_t reg_addr, unsigned long reg) { - WARN_ON_ONCE(ndev_is_unsafe(ndev, NTB_UNSAFE_DB)); + if (ndev_is_unsafe(ndev, NTB_UNSAFE_DB)) + pr_warn_once("%s: NTB unsafe doorbell access", __func__); if (db_addr) { *db_addr = reg_addr + reg; @@ -264,7 +265,8 @@ static inline int ndev_db_addr(struct intel_ntb_dev *ndev, static inline u64 ndev_db_read(struct intel_ntb_dev *ndev, void __iomem *mmio) { - WARN_ON_ONCE(ndev_is_unsafe(ndev, NTB_UNSAFE_DB)); + if (ndev_is_unsafe(ndev, NTB_UNSAFE_DB)) + pr_warn_once("%s: NTB unsafe doorbell access", __func__); return ndev->reg->db_ioread(mmio); } @@ -272,7 +274,8 @@ static inline u64 ndev_db_read(struct intel_ntb_dev *ndev, static inline int ndev_db_write(struct intel_ntb_dev *ndev, u64 db_bits, void __iomem *mmio) { - WARN_ON_ONCE(ndev_is_unsafe(ndev, NTB_UNSAFE_DB)); + if (ndev_is_unsafe(ndev, NTB_UNSAFE_DB)) + pr_warn_once("%s: NTB unsafe doorbell access", __func__); if (db_bits & ~ndev->db_valid_mask) return -EINVAL; @@ -287,7 +290,8 @@ static inline int ndev_db_set_mask(struct intel_ntb_dev *ndev, u64 db_bits, { unsigned long irqflags; - WARN_ON_ONCE(ndev_is_unsafe(ndev, NTB_UNSAFE_DB)); + if (ndev_is_unsafe(ndev, NTB_UNSAFE_DB)) + pr_warn_once("%s: NTB unsafe doorbell access", __func__); if (db_bits & ~ndev->db_valid_mask) return -EINVAL; @@ -307,7 +311,8 @@ static inline int ndev_db_clear_mask(struct intel_ntb_dev *ndev, u64 db_bits, { unsigned long irqflags; - WARN_ON_ONCE(ndev_is_unsafe(ndev, NTB_UNSAFE_DB)); + if (ndev_is_unsafe(ndev, NTB_UNSAFE_DB)) + pr_warn_once("%s: NTB unsafe doorbell access", __func__); if (db_bits & ~ndev->db_valid_mask) return -EINVAL; @@ -336,7 +341,8 @@ static inline int ndev_spad_addr(struct intel_ntb_dev *ndev, int idx, phys_addr_t *spad_addr, phys_addr_t reg_addr, unsigned long reg) { - WARN_ON_ONCE(ndev_is_unsafe(ndev, NTB_UNSAFE_SPAD)); + if (ndev_is_unsafe(ndev, NTB_UNSAFE_SPAD)) + pr_warn_once("%s: NTB unsafe scratchpad access", __func__); if (idx < 0 || idx >= ndev->spad_count) return -EINVAL; @@ -352,7 +358,8 @@ static inline int ndev_spad_addr(struct intel_ntb_dev *ndev, int idx, static inline u32 ndev_spad_read(struct intel_ntb_dev *ndev, int idx, void __iomem *mmio) { - WARN_ON_ONCE(ndev_is_unsafe(ndev, NTB_UNSAFE_SPAD)); + if (ndev_is_unsafe(ndev, NTB_UNSAFE_SPAD)) + pr_warn_once("%s: NTB unsafe scratchpad access", __func__); if (idx < 0 || idx >= ndev->spad_count) return 0; @@ -363,7 +370,8 @@ static inline u32 ndev_spad_read(struct intel_ntb_dev *ndev, int idx, static inline int ndev_spad_write(struct intel_ntb_dev *ndev, int idx, u32 val, void __iomem *mmio) { - WARN_ON_ONCE(ndev_is_unsafe(ndev, NTB_UNSAFE_SPAD)); + if (ndev_is_unsafe(ndev, NTB_UNSAFE_SPAD)) + pr_warn_once("%s: NTB unsafe scratchpad access", __func__); if (idx < 0 || idx >= ndev->spad_count) return -EINVAL; |