r8169: keep firmware in memory.

The firmware agent is not available during resume. Loading the firmware
during open() (see eee3a96c6368f47df8df5bd4ed1843600652b337) is not
enough.

close() is run during resume through rtl8169_reset_task(), whence the
mildly natural release of firmware in the driver removal method instead.

It will help with http://bugs.debian.org/609538. It will not avoid
the 60 seconds delay when:
- there is no firmware
- the driver is loaded and the device is not up before a suspend/resume

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Tested-by: Jarek Kamiński <jarek@vilo.eu.org>
Cc: Hayes <hayeswang@realtek.com>
Cc: Ben Hutchings <benh@debian.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 31 insertions, 12 deletions

diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
index bb8645ab247c..bde7d61f1930 100644
--- a/drivers/net/r8169.c
+++ b/drivers/net/r8169.c
@@ -554,6 +554,8 @@ struct rtl8169_private {
         struct mii_if_info mii;
         struct rtl8169_counters counters;
         u32 saved_wolopts;
+
+        const struct firmware *fw;
 };
 
 MODULE_AUTHOR("Realtek and the Linux r8169 crew <netdev@vger.kernel.org>");
@@ -1766,6 +1768,29 @@ rtl_phy_write_fw(struct rtl8169_private *tp, const struct firmware *fw)
         }
 }
 
+static void rtl_release_firmware(struct rtl8169_private *tp)
+{
+        release_firmware(tp->fw);
+        tp->fw = NULL;
+}
+
+static int rtl_apply_firmware(struct rtl8169_private *tp, const char *fw_name)
+{
+        const struct firmware **fw = &tp->fw;
+        int rc = !*fw;
+
+        if (rc) {
+                rc = request_firmware(fw, fw_name, &tp->pci_dev->dev);
+                if (rc < 0)
+                        goto out;
+        }
+
+        /* TODO: release firmware once rtl_phy_write_fw signals failures. */
+        rtl_phy_write_fw(tp, *fw);
+out:
+        return rc;
+}
+
 static void rtl8169s_hw_phy_config(struct rtl8169_private *tp)
 {
         static const struct phy_reg phy_reg_init[] = {
@@ -2139,7 +2164,6 @@ static void rtl8168d_1_hw_phy_config(struct rtl8169_private *tp)
                 { 0x0d, 0xf880 }
         };
         void __iomem *ioaddr = tp->mmio_addr;
-        const struct firmware *fw;
 
         rtl_writephy_batch(tp, phy_reg_init_0, ARRAY_SIZE(phy_reg_init_0));
 
@@ -2203,11 +2227,8 @@ static void rtl8168d_1_hw_phy_config(struct rtl8169_private *tp)
 
         rtl_writephy(tp, 0x1f, 0x0005);
         rtl_writephy(tp, 0x05, 0x001b);
-        if (rtl_readphy(tp, 0x06) == 0xbf00 &&
-            request_firmware(&fw, FIRMWARE_8168D_1, &tp->pci_dev->dev) == 0) {
-                rtl_phy_write_fw(tp, fw);
-                release_firmware(fw);
-        } else {
+        if ((rtl_readphy(tp, 0x06) != 0xbf00) ||
+            (rtl_apply_firmware(tp, FIRMWARE_8168D_1) < 0)) {
                 netif_warn(tp, probe, tp->dev, "unable to apply firmware patch\n");
         }
 
@@ -2257,7 +2278,6 @@ static void rtl8168d_2_hw_phy_config(struct rtl8169_private *tp)
                 { 0x0d, 0xf880 }
         };
         void __iomem *ioaddr = tp->mmio_addr;
-        const struct firmware *fw;
 
         rtl_writephy_batch(tp, phy_reg_init_0, ARRAY_SIZE(phy_reg_init_0));
 
@@ -2312,11 +2332,8 @@ static void rtl8168d_2_hw_phy_config(struct rtl8169_private *tp)
 
         rtl_writephy(tp, 0x1f, 0x0005);
         rtl_writephy(tp, 0x05, 0x001b);
-        if (rtl_readphy(tp, 0x06) == 0xb300 &&
-            request_firmware(&fw, FIRMWARE_8168D_2, &tp->pci_dev->dev) == 0) {
-                rtl_phy_write_fw(tp, fw);
-                release_firmware(fw);
-        } else {
+        if ((rtl_readphy(tp, 0x06) != 0xb300) ||
+            (rtl_apply_firmware(tp, FIRMWARE_8168D_2) < 0)) {
                 netif_warn(tp, probe, tp->dev, "unable to apply firmware patch\n");
         }
 
@@ -3200,6 +3217,8 @@ static void __devexit rtl8169_remove_one(struct pci_dev *pdev)
 
         cancel_delayed_work_sync(&tp->task);
 
+        rtl_release_firmware(tp);
+
         unregister_netdev(dev);
 
         if (pci_dev_run_wake(pdev))