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authorChristian Riesch <christian.riesch@omicron.at>2014-03-24 13:46:26 +0100
committerDavid S. Miller <davem@davemloft.net>2014-03-24 15:32:03 -0400
commit33b7107f59a61236d94ecd6b45e20283cd5abcc8 (patch)
tree26aec0e59cfad25d27c772f8191bf75c039c67c0 /drivers
parentc27f0872a3448c46e561e226b5b97f77187b06d2 (diff)
downloadlinux-linaro-stable-33b7107f59a61236d94ecd6b45e20283cd5abcc8.tar.gz
net: davinci_emac: Replace devm_request_irq with request_irq
In commit 6892b41d9701283085b655c6086fb57a5d63fa47 Author: Lad, Prabhakar <prabhakar.csengg@gmail.com> Date: Tue Jun 25 21:24:51 2013 +0530 net: davinci: emac: Convert to devm_* api the call of request_irq is replaced by devm_request_irq and the call of free_irq is removed. But since interrupts are requested in emac_dev_open, doing ifconfig up/down on the board requests the interrupts again each time, causing devm_request_irq to fail. The interface is dead until the device is rebooted. This patch reverts said commit partially: It changes the driver back to use request_irq instead of devm_request_irq, puts free_irq back in place, but keeps the remaining changes of the original patch. Reported-by: Jon Ringle <jon@ringle.org> Signed-off-by: Christian Riesch <christian.riesch@omicron.at> Cc: Lad, Prabhakar <prabhakar.csengg@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/ethernet/ti/davinci_emac.c25
1 files changed, 21 insertions, 4 deletions
diff --git a/drivers/net/ethernet/ti/davinci_emac.c b/drivers/net/ethernet/ti/davinci_emac.c
index cd9b164a0434..251430450005 100644
--- a/drivers/net/ethernet/ti/davinci_emac.c
+++ b/drivers/net/ethernet/ti/davinci_emac.c
@@ -1532,7 +1532,7 @@ static int emac_dev_open(struct net_device *ndev)
struct device *emac_dev = &ndev->dev;
u32 cnt;
struct resource *res;
- int ret;
+ int q, m, ret;
int i = 0;
int k = 0;
struct emac_priv *priv = netdev_priv(ndev);
@@ -1567,8 +1567,7 @@ static int emac_dev_open(struct net_device *ndev)
while ((res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, k))) {
for (i = res->start; i <= res->end; i++) {
- if (devm_request_irq(&priv->pdev->dev, i, emac_irq,
- 0, ndev->name, ndev))
+ if (request_irq(i, emac_irq, 0, ndev->name, ndev))
goto rollback;
}
k++;
@@ -1641,7 +1640,15 @@ static int emac_dev_open(struct net_device *ndev)
rollback:
- dev_err(emac_dev, "DaVinci EMAC: devm_request_irq() failed");
+ dev_err(emac_dev, "DaVinci EMAC: request_irq() failed");
+
+ for (q = k; k >= 0; k--) {
+ for (m = i; m >= res->start; m--)
+ free_irq(m, ndev);
+ res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, k-1);
+ m = res->end;
+ }
+
ret = -EBUSY;
err:
pm_runtime_put(&priv->pdev->dev);
@@ -1659,6 +1666,9 @@ err:
*/
static int emac_dev_stop(struct net_device *ndev)
{
+ struct resource *res;
+ int i = 0;
+ int irq_num;
struct emac_priv *priv = netdev_priv(ndev);
struct device *emac_dev = &ndev->dev;
@@ -1674,6 +1684,13 @@ static int emac_dev_stop(struct net_device *ndev)
if (priv->phydev)
phy_disconnect(priv->phydev);
+ /* Free IRQ */
+ while ((res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, i))) {
+ for (irq_num = res->start; irq_num <= res->end; irq_num++)
+ free_irq(irq_num, priv->ndev);
+ i++;
+ }
+
if (netif_msg_drv(priv))
dev_notice(emac_dev, "DaVinci EMAC: %s stopped\n", ndev->name);