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platform/x86: ISST: Check for unaligned mmio address 

The address should be aligned to 4 byte boundary. So send an error for
unaligned address.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://lore.kernel.org/r/20201204015746.1168941-1-srinivas.pandruvada@linux.intel.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Srinivas Pandruvada 2020-12-03 17:57:44 -08:00 committed by Hans de Goede
parent 8b105ef6ff
commit a552f204b0
1 changed files with 3 additions and 0 deletions
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3
drivers/platform/x86/intel_speed_select_if/isst_if_mmio.c
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@ -42,6 +42,9 @@ static long isst_if_mmio_rd_wr(u8 *cmd_ptr, int *write_only, int resume)
if (io_reg->reg < 0x04 || io_reg->reg > 0xD0)
return -EINVAL;
if (io_reg->reg % 4)
return -EINVAL;
if (io_reg->read_write && !capable(CAP_SYS_ADMIN))
return -EPERM;