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fsi: Fix one and two byte bus reads/writes

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Address checker fixed to allow one and two byte reads/writes.
Address alignments for each size verified.

Signed-off-by: Edward James <eajames@us.ibm.com>
Signed-off-by: Christopher Bostic <cbostic@linux.vnet.ibm.com>
Acked-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Eddie James 2018-02-12 15:45:43 +10:30 committed by Greg Kroah-Hartman
parent b8bd146d38
commit 99f039e97b
1 changed files with 7 additions and 4 deletions
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11
drivers/fsi/fsi-core.c
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@ -656,10 +656,13 @@ static int fsi_slave_init(struct fsi_master *master, int link, uint8_t id)
/* FSI master support */ /* FSI master support */
static int fsi_check_access(uint32_t addr, size_t size) static int fsi_check_access(uint32_t addr, size_t size)
{ {
if (size != 1 && size != 2 && size != 4) if (size == 4) {
return -EINVAL; if (addr & 0x3)
return -EINVAL;
if ((addr & 0x3) != (size & 0x3)) } else if (size == 2) {
if (addr & 0x1)
return -EINVAL;
} else if (size != 1)
return -EINVAL; return -EINVAL;
return 0; return 0;