From: Stephen Warren <swar...@nvidia.com>
Currently, "mmc dev 0" does not change the selected HW partition. I
think it makes more sense if "mmc dev 0" is an alias for "mmc dev 0 0",
i.e. that HW partition 0 (main data area) is always selected by default
if the user didn't request a specific partition. Otherwise, the following
happens, which feels wrong:
Select HW partition 1 (boot0):
mmc dev 0 1
Doesn't change the HW partition, so it's still 1 (boot0):
mmc dev 0
With this patch, the second command above re-selects the main data area.
Note that some MMC devices (i.e. SD cards) don't support HW partitions.
However, this patch still works, since mmc_start_init() sets the current
partition number to 0, and mmc_select_hwpart() succeeds if the requested
partition is already selected.
Signed-off-by: Stephen Warren <swar...@nvidia.com>
---
This series depends on "mmc: return meaningful error codes from
mmc_select_hwpart" (which I just sent) for context.
common/cmd_mmc.c | 15 +++++++--------
1 file changed, 7 insertions(+), 8 deletions(-)
diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c
index eea337506c3f..9e6a26fe62a2 100644
--- a/common/cmd_mmc.c
+++ b/common/cmd_mmc.c
@@ -403,7 +403,7 @@ static int do_mmc_part(cmd_tbl_t *cmdtp, int flag,
static int do_mmc_dev(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
- int dev, part = -1, ret;
+ int dev, part = 0, ret;
struct mmc *mmc;
if (argc == 1) {
@@ -426,13 +426,12 @@ static int do_mmc_dev(cmd_tbl_t *cmdtp, int flag,
if (!mmc)
return CMD_RET_FAILURE;
- if (part != -1) {
- ret = mmc_select_hwpart(dev, part);
- printf("switch to partitions #%d, %s\n",
- part, (!ret) ? "OK" : "ERROR");
- if (ret)
- return 1;
- }
+ ret = mmc_select_hwpart(dev, part);
+ printf("switch to partitions #%d, %s\n",
+ part, (!ret) ? "OK" : "ERROR");
+ if (ret)
+ return 1;
+
curr_device = dev;
if (mmc->part_config == MMCPART_NOAVAILABLE)
printf("mmc%d is current device\n", curr_device);
--
1.8.1.5
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