diff options
| author | Ben Hutchings <bhutchings@solarflare.com> | 2010-01-26 00:49:59 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-01-26 00:49:59 +0100 |
| commit | 5a27e86babe79cf5f575394bb1055448458df6c7 (patch) | |
| tree | fa64f367db6367525ed6fb3097e6a509ec93c581 /drivers/net/sfc/mcdi.c | |
| parent | sfc: Add workspace for GMAC bug workaround to MCDI MAC_STATS buffer (diff) | |
| download | linux-5a27e86babe79cf5f575394bb1055448458df6c7.tar.xz linux-5a27e86babe79cf5f575394bb1055448458df6c7.zip | |
sfc: Use fixed-size buffers for MCDI NVRAM requests
The low-level MCDI code always uses 32-bit MMIO operations, and
callers must pad input and output buffers to multiples of 4 bytes.
The MCDI NVRAM functions are not doing this. Also, their buffers are
declared as variable-length arrays with no explicit maximum length.
Switch to a fixed buffer size based on the chunk size used by the
MTD driver (which is a multiple of 4).
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/sfc/mcdi.c')
| -rw-r--r-- | drivers/net/sfc/mcdi.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/net/sfc/mcdi.c b/drivers/net/sfc/mcdi.c index 0d4eba7266ec..9f035b9f0350 100644 --- a/drivers/net/sfc/mcdi.c +++ b/drivers/net/sfc/mcdi.c @@ -804,7 +804,7 @@ int efx_mcdi_nvram_read(struct efx_nic *efx, unsigned int type, loff_t offset, u8 *buffer, size_t length) { u8 inbuf[MC_CMD_NVRAM_READ_IN_LEN]; - u8 outbuf[MC_CMD_NVRAM_READ_OUT_LEN(length)]; + u8 outbuf[MC_CMD_NVRAM_READ_OUT_LEN(EFX_MCDI_NVRAM_LEN_MAX)]; size_t outlen; int rc; @@ -828,7 +828,7 @@ fail: int efx_mcdi_nvram_write(struct efx_nic *efx, unsigned int type, loff_t offset, const u8 *buffer, size_t length) { - u8 inbuf[MC_CMD_NVRAM_WRITE_IN_LEN(length)]; + u8 inbuf[MC_CMD_NVRAM_WRITE_IN_LEN(EFX_MCDI_NVRAM_LEN_MAX)]; int rc; MCDI_SET_DWORD(inbuf, NVRAM_WRITE_IN_TYPE, type); @@ -838,7 +838,8 @@ int efx_mcdi_nvram_write(struct efx_nic *efx, unsigned int type, BUILD_BUG_ON(MC_CMD_NVRAM_WRITE_OUT_LEN != 0); - rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_WRITE, inbuf, sizeof(inbuf), + rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_WRITE, inbuf, + ALIGN(MC_CMD_NVRAM_WRITE_IN_LEN(length), 4), NULL, 0, NULL); if (rc) goto fail; |