Return-path: Received: from wolverine02.qualcomm.com ([199.106.114.251]:48156 "EHLO wolverine02.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752950Ab2BVHKT (ORCPT ); Wed, 22 Feb 2012 02:10:19 -0500 From: Sujith Manoharan MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Message-ID: <20292.38097.735846.731941@gargle.gargle.HOWL> (sfid-20120222_081035_403984_0EB0A9C0) Date: Wed, 22 Feb 2012 12:40:09 +0530 To: CC: , Subject: [PATCH 02/26] ath9k: Cleanup MCI init/deinit routines Sender: linux-wireless-owner@vger.kernel.org List-ID: This patch simplifies the buffer allocation functions for MCI and removes unneeded memset calls. Also, a couple of unused variables are removed and a memory leak in DMA allocation is fixed. [ 1263.788267] WARNING: at /home/sujith/dev/wireless-testing/lib/dma-debug.c:875 check_unmap+0x173/0x7e0() [ 1263.788273] ath9k 0000:06:00.0: DMA-API: device driver frees DMA memory with different size [device address=0x0000000071908000] [map size=512 bytes] [unmap size=256 bytes] [ 1263.788345] Pid: 774, comm: rmmod Tainted: G W O 3.3.0-rc3-wl #18 [ 1263.788348] Call Trace: [ 1263.788355] [] warn_slowpath_common+0x7f/0xc0 [ 1263.788359] [] warn_slowpath_fmt+0x46/0x50 [ 1263.788363] [] check_unmap+0x173/0x7e0 [ 1263.788368] [] ? prio_tree_left+0x32/0xc0 [ 1263.788373] [] debug_dma_free_coherent+0x6d/0x80 [ 1263.788381] [] ath_mci_cleanup+0x7c/0x110 [ath9k] [ 1263.788387] [] ath9k_deinit_softc+0x113/0x120 [ath9k] [ 1263.788392] [] ath9k_deinit_device+0x5c/0x70 [ath9k] [ 1263.788397] [] ath_pci_remove+0x54/0xa0 [ath9k] [ 1263.788401] [] pci_device_remove+0x46/0x110 [ 1263.788406] [] __device_release_driver+0x7c/0xe0 [ 1263.788410] [] driver_detach+0xd0/0xe0 [ 1263.788414] [] bus_remove_driver+0x88/0xe0 [ 1263.788418] [] driver_unregister+0x62/0xa0 [ 1263.788421] [] pci_unregister_driver+0x44/0xc0 [ 1263.788427] [] ath_pci_exit+0x15/0x20 [ath9k] [ 1263.788432] [] ath9k_exit+0x15/0x31 [ath9k] [ 1263.788436] [] sys_delete_module+0x18c/0x270 [ 1263.788441] [] ? retint_swapgs+0x13/0x1b [ 1263.788446] [] ? trace_hardirqs_on_thunk+0x3a/0x3f [ 1263.788450] [] system_call_fastpath+0x16/0x1b [ 1263.788453] ---[ end trace 3ab4d030ffde40d4 ]--- Signed-off-by: Sujith Manoharan --- drivers/net/wireless/ath/ath9k/ar9003_mci.c | 5 -- drivers/net/wireless/ath/ath9k/btcoex.h | 1 - drivers/net/wireless/ath/ath9k/mci.c | 70 +++++++++------------------ drivers/net/wireless/ath/ath9k/mci.h | 3 - 4 files changed, 23 insertions(+), 56 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/ar9003_mci.c b/drivers/net/wireless/ath/ath9k/ar9003_mci.c index 8439656..2cd607f 100644 --- a/drivers/net/wireless/ath/ath9k/ar9003_mci.c +++ b/drivers/net/wireless/ath/ath9k/ar9003_mci.c @@ -973,7 +973,6 @@ void ar9003_mci_setup(struct ath_hw *ah, u32 gpm_addr, void *gpm_buf, u16 len, u32 sched_addr) { struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci; - void *sched_buf = (void *)((char *) gpm_buf + (sched_addr - gpm_addr)); if (!ATH9K_HW_CAP_MCI) return; @@ -982,7 +981,6 @@ void ar9003_mci_setup(struct ath_hw *ah, u32 gpm_addr, void *gpm_buf, mci->gpm_buf = gpm_buf; mci->gpm_len = len; mci->sched_addr = sched_addr; - mci->sched_buf = sched_buf; ar9003_mci_reset(ah, true, true, true); } @@ -990,14 +988,11 @@ EXPORT_SYMBOL(ar9003_mci_setup); void ar9003_mci_cleanup(struct ath_hw *ah) { - struct ath_common *common = ath9k_hw_common(ah); - if (!ATH9K_HW_CAP_MCI) return; /* Turn off MCI and Jupiter mode. */ REG_WRITE(ah, AR_BTCOEX_CTRL, 0x00); - ath_dbg(common, MCI, "MCI ar9003_mci_cleanup\n"); ar9003_mci_disable_interrupt(ah); } EXPORT_SYMBOL(ar9003_mci_cleanup); diff --git a/drivers/net/wireless/ath/ath9k/btcoex.h b/drivers/net/wireless/ath/ath9k/btcoex.h index 278361c..0cb7ce9 100644 --- a/drivers/net/wireless/ath/ath9k/btcoex.h +++ b/drivers/net/wireless/ath/ath9k/btcoex.h @@ -67,7 +67,6 @@ struct ath9k_hw_mci { u32 wlan_cal_done; u32 config; u8 *gpm_buf; - u8 *sched_buf; bool ready; bool update_2g5g; bool is_2g; diff --git a/drivers/net/wireless/ath/ath9k/mci.c b/drivers/net/wireless/ath/ath9k/mci.c index 05c23ea..85a957a 100644 --- a/drivers/net/wireless/ath/ath9k/mci.c +++ b/drivers/net/wireless/ath/ath9k/mci.c @@ -383,84 +383,60 @@ static void ath_mci_msg(struct ath_softc *sc, u8 opcode, u8 *rx_payload) } } -static int ath_mci_buf_alloc(struct ath_softc *sc, struct ath_mci_buf *buf) -{ - int error = 0; - - buf->bf_addr = dma_alloc_coherent(sc->dev, buf->bf_len, - &buf->bf_paddr, GFP_KERNEL); - - if (buf->bf_addr == NULL) { - error = -ENOMEM; - goto fail; - } - - return 0; - -fail: - memset(buf, 0, sizeof(*buf)); - return error; -} - -static void ath_mci_buf_free(struct ath_softc *sc, struct ath_mci_buf *buf) -{ - if (buf->bf_addr) { - dma_free_coherent(sc->dev, buf->bf_len, buf->bf_addr, - buf->bf_paddr); - memset(buf, 0, sizeof(*buf)); - } -} - int ath_mci_setup(struct ath_softc *sc) { struct ath_common *common = ath9k_hw_common(sc->sc_ah); struct ath_mci_coex *mci = &sc->mci_coex; - int error = 0; + struct ath_mci_buf *buf = &mci->sched_buf; if (!ATH9K_HW_CAP_MCI) return 0; - mci->sched_buf.bf_len = ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE; + buf->bf_addr = dma_alloc_coherent(sc->dev, + ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE, + &buf->bf_paddr, GFP_KERNEL); - if (ath_mci_buf_alloc(sc, &mci->sched_buf)) { + if (buf->bf_addr == NULL) { ath_dbg(common, FATAL, "MCI buffer alloc failed\n"); - error = -ENOMEM; - goto fail; + return -ENOMEM; } - mci->sched_buf.bf_len = ATH_MCI_SCHED_BUF_SIZE; + memset(buf->bf_addr, MCI_GPM_RSVD_PATTERN, + ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE); - memset(mci->sched_buf.bf_addr, MCI_GPM_RSVD_PATTERN, - mci->sched_buf.bf_len); + mci->sched_buf.bf_len = ATH_MCI_SCHED_BUF_SIZE; mci->gpm_buf.bf_len = ATH_MCI_GPM_BUF_SIZE; - mci->gpm_buf.bf_addr = (u8 *)mci->sched_buf.bf_addr + - mci->sched_buf.bf_len; + mci->gpm_buf.bf_addr = (u8 *)mci->sched_buf.bf_addr + mci->sched_buf.bf_len; mci->gpm_buf.bf_paddr = mci->sched_buf.bf_paddr + mci->sched_buf.bf_len; - /* initialize the buffer */ - memset(mci->gpm_buf.bf_addr, MCI_GPM_RSVD_PATTERN, mci->gpm_buf.bf_len); - ar9003_mci_setup(sc->sc_ah, mci->gpm_buf.bf_paddr, mci->gpm_buf.bf_addr, (mci->gpm_buf.bf_len >> 4), mci->sched_buf.bf_paddr); -fail: - return error; + + ath_dbg(common, MCI, "MCI Initialized\n"); + + return 0; } void ath_mci_cleanup(struct ath_softc *sc) { + struct ath_common *common = ath9k_hw_common(sc->sc_ah); struct ath_hw *ah = sc->sc_ah; struct ath_mci_coex *mci = &sc->mci_coex; + struct ath_mci_buf *buf = &mci->sched_buf; if (!ATH9K_HW_CAP_MCI) return; - /* - * both schedule and gpm buffers will be released - */ - ath_mci_buf_free(sc, &mci->sched_buf); + if (buf->bf_addr) + dma_free_coherent(sc->dev, + ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE, + buf->bf_addr, buf->bf_paddr); + ar9003_mci_cleanup(ah); + + ath_dbg(common, MCI, "MCI De-Initialized\n"); } void ath_mci_intr(struct ath_softc *sc) diff --git a/drivers/net/wireless/ath/ath9k/mci.h b/drivers/net/wireless/ath/ath9k/mci.h index 29e3e51..b805bf2 100644 --- a/drivers/net/wireless/ath/ath9k/mci.h +++ b/drivers/net/wireless/ath/ath9k/mci.h @@ -113,7 +113,6 @@ struct ath_mci_profile { u8 num_bdr; }; - struct ath_mci_buf { void *bf_addr; /* virtual addr of desc */ dma_addr_t bf_paddr; /* physical addr of buffer */ @@ -121,10 +120,8 @@ struct ath_mci_buf { }; struct ath_mci_coex { - atomic_t mci_cal_flag; struct ath_mci_buf sched_buf; struct ath_mci_buf gpm_buf; - u32 bt_cal_start; }; void ath_mci_flush_profile(struct ath_mci_profile *mci); -- 1.7.9.1