diff options
| author | Maciej W. Rozycki <macro@orcam.me.uk> | 2026-03-29 21:07:41 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-04-01 05:32:41 +0300 |
| commit | aae5efaeb8aa4ada710d5b0cdbab77b9539c69eb (patch) | |
| tree | fcb87acef183edd08f421c359906b0b16098f0ca | |
| parent | ee769323b1bf60c0ec0338cc5ee6b1c725624ec6 (diff) | |
| download | linux-aae5efaeb8aa4ada710d5b0cdbab77b9539c69eb.tar.xz | |
declance: Include the offending address with DMA errors
The address latched in the I/O ASIC LANCE DMA Pointer Register uses the
TURBOchannel bus address encoding and therefore bits 33:29 of location
referred occupy bits 4:0, bits 28:2 are left-shifted by 3, and bits 1:0
are hardwired to zero. In reality no TURBOchannel system exceeds 1GiB
of RAM though, so the address reported will always fit in 8 hex digits.
Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Link: https://patch.msgid.link/alpine.DEB.2.21.2603291839220.60268@angie.orcam.me.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/amd/declance.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/ethernet/amd/declance.c b/drivers/net/ethernet/amd/declance.c index 24aa4803b4ae..c7d47ca603a8 100644 --- a/drivers/net/ethernet/amd/declance.c +++ b/drivers/net/ethernet/amd/declance.c @@ -726,8 +726,10 @@ out: static irqreturn_t lance_dma_merr_int(int irq, void *dev_id) { struct net_device *dev = dev_id; + u64 ldp = ioasic_read(IO_REG_LANCE_DMA_P); - pr_err_ratelimited("%s: DMA error\n", dev->name); + pr_err_ratelimited("%s: DMA error at %#010llx\n", dev->name, + (ldp & 0x1f) << 29 | (ldp & 0xffffffe0) >> 3); return IRQ_HANDLED; } |