diff options
Diffstat (limited to 'package/kernel/mac80211/patches/rt2x00/027-rt2800mmio-fetch-tx-status-changes.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/rt2x00/027-rt2800mmio-fetch-tx-status-changes.patch | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/rt2x00/027-rt2800mmio-fetch-tx-status-changes.patch b/package/kernel/mac80211/patches/rt2x00/027-rt2800mmio-fetch-tx-status-changes.patch new file mode 100644 index 0000000000..4bb62c2288 --- /dev/null +++ b/package/kernel/mac80211/patches/rt2x00/027-rt2800mmio-fetch-tx-status-changes.patch @@ -0,0 +1,61 @@ +From f6a9618198e190a2ba09ce3f0aa8e9ee1763bd38 Mon Sep 17 00:00:00 2001 +From: Stanislaw Gruszka <sgruszka@redhat.com> +Date: Sat, 9 Feb 2019 12:08:34 +0100 +X-Patchwork-Submitter: Stanislaw Gruszka <sgruszka@redhat.com> +X-Patchwork-Id: 10804443 +X-Patchwork-Delegate: kvalo@adurom.com +Subject: [PATCH 24/28] rt2800mmio: fetch tx status changes + +Prepare to use rt2800mmio_fetch_txstatus() in concurrent manner and drop +return value since is not longer needed. + +Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> +--- + drivers/net/wireless/ralink/rt2x00/rt2800mmio.c | 17 +++++++++-------- + 1 file changed, 9 insertions(+), 8 deletions(-) + +--- a/drivers/net/wireless/ralink/rt2x00/rt2800mmio.c ++++ b/drivers/net/wireless/ralink/rt2x00/rt2800mmio.c +@@ -255,12 +255,12 @@ void rt2800mmio_autowake_tasklet(unsigne + } + EXPORT_SYMBOL_GPL(rt2800mmio_autowake_tasklet); + +-static bool rt2800mmio_fetch_txstatus(struct rt2x00_dev *rt2x00dev) ++static void rt2800mmio_fetch_txstatus(struct rt2x00_dev *rt2x00dev) + { + u32 status; +- bool more = false; ++ unsigned long flags; + +- /* FIXEME: rewrite this comment ++ /* + * The TX_FIFO_STATUS interrupt needs special care. We should + * read TX_STA_FIFO but we should do it immediately as otherwise + * the register can overflow and we would lose status reports. +@@ -271,20 +271,21 @@ static bool rt2800mmio_fetch_txstatus(st + * because we can schedule the tasklet multiple times (when the + * interrupt fires again during tx status processing). + * +- * txstatus tasklet is called with INT_SOURCE_CSR_TX_FIFO_STATUS +- * disabled so have only one producer and one consumer - we don't +- * need to lock the kfifo. ++ * We also read statuses from tx status timeout timer, use ++ * lock to prevent concurent writes to fifo. + */ ++ ++ spin_lock_irqsave(&rt2x00dev->irqmask_lock, flags); ++ + while (!kfifo_is_full(&rt2x00dev->txstatus_fifo)) { + status = rt2x00mmio_register_read(rt2x00dev, TX_STA_FIFO); + if (!rt2x00_get_field32(status, TX_STA_FIFO_VALID)) + break; + + kfifo_put(&rt2x00dev->txstatus_fifo, status); +- more = true; + } + +- return more; ++ spin_unlock_irqrestore(&rt2x00dev->irqmask_lock, flags); + } + + void rt2800mmio_txstatus_tasklet(unsigned long data) |