From: Daniel Golle Date: Wed, 15 Aug 2018 13:22:43 +0000 (+0200) Subject: mac80211: rt2x00: remove obsolete patch X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=c837c41a768ddd6f3d028fe480dd972b40389b2a;p=openwrt%2Fstaging%2Fnbd.git mac80211: rt2x00: remove obsolete patch According to Stanislaw Gruszka the patch 600-23-rt2x00-rt2800mmio-add-a-workaround-for-spurious-TX_F.patch should be dropped. Signed-off-by: Daniel Golle --- diff --git a/package/kernel/mac80211/patches/rt2x00/600-23-rt2x00-rt2800mmio-add-a-workaround-for-spurious-TX_F.patch b/package/kernel/mac80211/patches/rt2x00/600-23-rt2x00-rt2800mmio-add-a-workaround-for-spurious-TX_F.patch deleted file mode 100644 index 342174f8d5..0000000000 --- a/package/kernel/mac80211/patches/rt2x00/600-23-rt2x00-rt2800mmio-add-a-workaround-for-spurious-TX_F.patch +++ /dev/null @@ -1,136 +0,0 @@ -From 5e67d4f8a46d19748b501c2ef86de3f50d3cfd51 Mon Sep 17 00:00:00 2001 -From: Gabor Juhos -Date: Sun, 24 Mar 2013 19:26:27 +0100 -Subject: [PATCH] rt2x00: rt2800mmio: add a workaround for spurious - TX_FIFO_STATUS interrupts - -Signed-off-by: Gabor Juhos ---- - drivers/net/wireless/ralink/rt2x00/rt2800mmio.c | 72 +++++++++++++++++++++++++----- - drivers/net/wireless/ralink/rt2x00/rt2x00.h | 5 +++ - 2 files changed, 65 insertions(+), 12 deletions(-) - ---- a/drivers/net/wireless/ralink/rt2x00/rt2800mmio.c -+++ b/drivers/net/wireless/ralink/rt2x00/rt2800mmio.c -@@ -424,9 +424,9 @@ void rt2800mmio_autowake_tasklet(unsigne - } - EXPORT_SYMBOL_GPL(rt2800mmio_autowake_tasklet); - --static void rt2800mmio_txstatus_interrupt(struct rt2x00_dev *rt2x00dev) -+static void rt2800mmio_txstatus_interrupt(struct rt2x00_dev *rt2x00dev, -+ u32 status) - { -- u32 status; - int i; - - /* -@@ -447,29 +447,77 @@ static void rt2800mmio_txstatus_interrup - * Since we have only one producer and one consumer we don't - * need to lock the kfifo. - */ -- for (i = 0; i < rt2x00dev->tx->limit; i++) { -- status = rt2x00mmio_register_read(rt2x00dev, TX_STA_FIFO); -- -- if (!rt2x00_get_field32(status, TX_STA_FIFO_VALID)) -- break; -- -+ i = 0; -+ do { - if (!kfifo_put(&rt2x00dev->txstatus_fifo, status)) { -- rt2x00_warn(rt2x00dev, "TX status FIFO overrun, drop tx status report\n"); -+ rt2x00_warn(rt2x00dev, -+ "TX status FIFO overrun, drop TX status report\n"); - break; - } -- } -+ -+ if (++i >= rt2x00dev->tx->limit) -+ break; -+ -+ status = rt2x00mmio_register_read(rt2x00dev, TX_STA_FIFO); -+ } while (rt2x00_get_field32(status, TX_STA_FIFO_VALID)); - - /* Schedule the tasklet for processing the tx status. */ - tasklet_schedule(&rt2x00dev->txstatus_tasklet); - } - -+#define RT2800MMIO_TXSTATUS_IRQ_MAX_RETRIES 4 -+ -+static bool rt2800mmio_txstatus_is_spurious(struct rt2x00_dev *rt2x00dev, -+ u32 txstatus) -+{ -+ if (likely(rt2x00_get_field32(txstatus, TX_STA_FIFO_VALID))) { -+ rt2x00dev->txstatus_irq_retries = 0; -+ return false; -+ } -+ -+ rt2x00dev->txstatus_irq_retries++; -+ -+ /* Ensure that we don't go into an infinite IRQ loop. */ -+ if (rt2x00dev->txstatus_irq_retries >= -+ RT2800MMIO_TXSTATUS_IRQ_MAX_RETRIES) { -+ rt2x00_warn(rt2x00dev, -+ "%u spurious TX_FIFO_STATUS interrupt(s)\n", -+ rt2x00dev->txstatus_irq_retries); -+ rt2x00dev->txstatus_irq_retries = 0; -+ return false; -+ } -+ -+ return true; -+} -+ - irqreturn_t rt2800mmio_interrupt(int irq, void *dev_instance) - { - struct rt2x00_dev *rt2x00dev = dev_instance; - u32 reg, mask; -+ u32 txstatus = 0; - -- /* Read status and ACK all interrupts */ -+ /* Read status */ - reg = rt2x00mmio_register_read(rt2x00dev, INT_SOURCE_CSR); -+ -+ if (rt2x00_get_field32(reg, INT_SOURCE_CSR_TX_FIFO_STATUS)) { -+ /* Due to unknown reason the hardware generates a -+ * TX_FIFO_STATUS interrupt before the TX_STA_FIFO -+ * register contain valid data. Read the TX status -+ * here to see if we have to process the actual -+ * request. -+ */ -+ txstatus = rt2x00mmio_register_read(rt2x00dev, TX_STA_FIFO); -+ if (rt2800mmio_txstatus_is_spurious(rt2x00dev, txstatus)) { -+ /* Remove the TX_FIFO_STATUS bit so it won't be -+ * processed in this turn. The hardware will -+ * generate another IRQ for us. -+ */ -+ rt2x00_set_field32(®, -+ INT_SOURCE_CSR_TX_FIFO_STATUS, 0); -+ } -+ } -+ -+ /* ACK interrupts */ - rt2x00mmio_register_write(rt2x00dev, INT_SOURCE_CSR, reg); - - if (!reg) -@@ -486,7 +534,7 @@ irqreturn_t rt2800mmio_interrupt(int irq - mask = ~reg; - - if (rt2x00_get_field32(reg, INT_SOURCE_CSR_TX_FIFO_STATUS)) { -- rt2800mmio_txstatus_interrupt(rt2x00dev); -+ rt2800mmio_txstatus_interrupt(rt2x00dev, txstatus); - /* - * Never disable the TX_FIFO_STATUS interrupt. - */ ---- a/drivers/net/wireless/ralink/rt2x00/rt2x00.h -+++ b/drivers/net/wireless/ralink/rt2x00/rt2x00.h -@@ -1000,6 +1000,11 @@ struct rt2x00_dev { - int rf_channel; - - /* -+ * Counter for tx status irq retries (rt2800pci). -+ */ -+ unsigned int txstatus_irq_retries; -+ -+ /* - * Protect the interrupt mask register. - */ - spinlock_t irqmask_lock;