avr32: fix a bug in the MMC driver

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11580 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/avr32/patches/120-fast_sd_cards_fix.patch b/target/linux/avr32/patches/120-fast_sd_cards_fix.patch
new file mode 100644 (file)
index 0000000..2d79b9d
--- /dev/null
+++ b/target/linux/avr32/patches/120-fast_sd_cards_fix.patch
@@ -0,0 +1,43 @@
+--- a/drivers/mmc/host/atmel-mci.c
++++ b/drivers/mmc/host/atmel-mci.c
+@@ -77,6 +77,7 @@ struct atmel_mci {
+       struct clk              *mck;
+       struct platform_device  *pdev;
+ 
++      int pending_stop;
+ #ifdef CONFIG_DEBUG_FS
+       struct dentry           *debugfs_root;
+       struct dentry           *debugfs_regs;
+@@ -866,6 +867,12 @@ static void atmci_tasklet_func(unsigned long priv)
+               data->bytes_xfered = data->blocks * data->blksz;
+               atmci_data_complete(host, data);
+       }
++      /* See if there is a pending STOP which can be sent */
++      if (host->pending_stop && mci_cmd_is_complete(host)) {
++              host->pending_stop = 0;
++              if (mrq->stop && !mci_set_stop_sent_is_completed(host))
++                      send_stop_cmd(host->mmc, mrq->data, 0);
++      }
+ }
+ 
+ static void atmci_cmd_interrupt(struct mmc_host *mmc, u32 status)
+@@ -918,9 +925,16 @@ static void atmci_xfer_complete(struct dma_request *_req)
+        * drivers) or when interrupts are disabled for a long time.
+        */
+       mci_set_dma_complete(host);
+-      if (data->stop && mci_cmd_is_complete(host)
+-                      && !mci_set_stop_sent_is_completed(host))
+-              send_stop_cmd(host->mmc, data, 0);
++
++      if (data->stop) {
++              if (!mci_cmd_is_complete(host)) {
++                      /* Just remember a STOP must be sent */
++                      host->pending_stop = 1;
++              } else if (!mci_set_stop_sent_is_completed(host)) {
++                      send_stop_cmd(host->mmc, data, 0);
++                      host->pending_stop = 0;
++              }
++      }
+ 
+       /*
+        * Regardless of what the documentation says, we have to wait