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authorAnton Vorontsov <avorontsov@ru.mvista.com>2008-06-17 18:17:39 +0400
committerPierre Ossman <drzeus@drzeus.cx>2008-07-15 14:14:41 +0200
commit08f80bb5196517a0dfe50dc7c10f234c0ff2f0e8 (patch)
treeaee5e1808521eb3c00ff37d50a2e8957bebbd34b /drivers/mmc/host/wbsd.c
parent619ef4b42128709de4d89d209b2c874f560deecd (diff)
downloadop-kernel-dev-08f80bb5196517a0dfe50dc7c10f234c0ff2f0e8.zip
op-kernel-dev-08f80bb5196517a0dfe50dc7c10f234c0ff2f0e8.tar.gz
mmc: change .get_ro() callback semantics
Now get_ro() callback must return 0/1 values for its logical states, and negative errno values in case of error. If particular host instance doesn't support RO/WP switch, it should return -ENOSYS. This patch changes some hosts in two ways: 1. Now functions should be smart to not return negative values in "RO asserted" case (particularly gpio_ calls could return negative values for the outermost GPIOs). Also, board code usually passes get_ro() callbacks that directly return gpioreg & bit result, so at91_mci, imxmmc, pxamci and mmc_spi's get_ro() handlers need take special care when returning platform's values to the mmc core. 2. In case of host instance didn't implement get_ro() callback, it should really return -ENOSYS and let the mmc core decide what to do about it (mmc core thinks the same way as the hosts, so it isn't functional change). Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc/host/wbsd.c')
-rw-r--r--drivers/mmc/host/wbsd.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/mmc/host/wbsd.c b/drivers/mmc/host/wbsd.c
index c303e7f..67e5a9b 100644
--- a/drivers/mmc/host/wbsd.c
+++ b/drivers/mmc/host/wbsd.c
@@ -939,7 +939,7 @@ static int wbsd_get_ro(struct mmc_host *mmc)
spin_unlock_bh(&host->lock);
- return csr & WBSD_WRPT;
+ return !!(csr & WBSD_WRPT);
}
static const struct mmc_host_ops wbsd_ops = {
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