mmc: core: warn when card doesn't support HPI

Someone could use send_hpi_cmd() on a card that doesn't advertise support
for HPI.  Then maybe didn't work fine.  Because card->ext_csd.hpi_cmd
didn't set.  So if card didn't support hpi, return the warning message.

And CMD12's flags is MMC_RSP_R1B.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

1 files changed, 8 insertions, 4 deletions

diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
index 4d41fa984c9..69370f494e0 100644
--- a/drivers/mmc/core/mmc_ops.c
+++ b/drivers/mmc/core/mmc_ops.c
@@ -553,18 +553,22 @@ int mmc_send_hpi_cmd(struct mmc_card *card, u32 *status)
 {
         struct mmc_command cmd = {0};
         unsigned int opcode;
-        unsigned int flags;
         int err;
 
+        if (!card->ext_csd.hpi) {
+                pr_warning("%s: Card didn't support HPI command\n",
+                           mmc_hostname(card->host));
+                return -EINVAL;
+        }
+
         opcode = card->ext_csd.hpi_cmd;
         if (opcode == MMC_STOP_TRANSMISSION)
-                flags = MMC_RSP_R1 | MMC_CMD_AC;
+                cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
         else if (opcode == MMC_SEND_STATUS)
-                flags = MMC_RSP_R1 | MMC_CMD_AC;
+                cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
 
         cmd.opcode = opcode;
         cmd.arg = card->rca << 16 | 1;
-        cmd.flags = flags;
         cmd.cmd_timeout_ms = card->ext_csd.out_of_int_time;
 
         err = mmc_wait_for_cmd(card->host, &cmd, 0);