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linux/drivers/bluetooth
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Maxim Mikityanskiy 268d3636df Bluetooth: btrtl: Use kvmalloc for FW allocations 
Currently, kmemdup is applied to the firmware data, and it invokes
kmalloc under the hood. The firmware size and patch_length are big (more
than PAGE_SIZE), and on some low-end systems (like ASUS E202SA) kmalloc
may fail to allocate a contiguous chunk under high memory usage and
fragmentation:

Bluetooth: hci0: RTL: examining hci_ver=06 hci_rev=000a lmp_ver=06 lmp_subver=8821
Bluetooth: hci0: RTL: rom_version status=0 version=1
Bluetooth: hci0: RTL: loading rtl_bt/rtl8821a_fw.bin
kworker/u9:2: page allocation failure: order:4, mode:0x40cc0(GFP_KERNEL|__GFP_COMP), nodemask=(null),cpuset=/,mems_allowed=0
<stack trace follows>

As firmware load happens on each resume, Bluetooth will stop working
after several iterations, when the kernel fails to allocate an order-4
page.

This patch replaces kmemdup with kvmalloc+memcpy. It's not required to
have a contiguous chunk here, because it's not mapped to the device
directly.

Signed-off-by: Maxim Mikityanskiy <maxtram95@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2020-01-24 19:57:53 +01:00
..
ath3k.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
bcm203x.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
bfusb.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
bluecard_cs.c bluetooth: bluecard_cs: Replace GFP_ATOMIC with GFP_KERNEL in bluecard_hci_set_baud_rate() 2018-07-23 18:05:00 +02:00
bpa10x.c Bluetooth: bpa10x: change return value 2019-09-04 16:11:46 +02:00
bt3c_cs.c Bluetooth: bt3c_cs: Fix obsolete function 2018-09-27 12:57:39 +02:00
btbcm.c Bluetooth: btbcm : Fix warning about missing blank lines after declarations 2020-01-09 21:24:47 +01:00
btbcm.h Bluetooth: btbcm: Add missing static inline in header 2020-01-04 10:41:03 +01:00
btintel.c Bluetooth: btusb: Trigger Intel FW download error recovery 2019-10-17 09:23:47 +02:00
btintel.h Bluetooth: btusb: Remove return statement in btintel_reset_to_bootloader 2019-10-19 09:56:20 +02:00
btmrvl_debugfs.c Bluetooth: btmrvl: Re-use kstrtol_from_user() 2018-05-30 08:16:05 +02:00
btmrvl_drv.h Bluetooth: btmrvl: Drop unused GPIO includes 2019-01-22 09:51:20 +01:00
btmrvl_main.c Bluetooth: btmrvl: support sysfs initiated firmware coredump 2018-05-29 15:59:50 +02:00
btmrvl_sdio.c Bluetooth: btmrvl: add support for SD8987 chipset 2019-04-23 19:01:45 +02:00
btmrvl_sdio.h btmrvl: add platform specific wakeup interrupt support 2016-05-02 19:26:15 +02:00
btmtksdio.c Bluetooth: btmtksdio: add MODULE_DEVICE_TABLE() 2019-11-07 15:15:41 +01:00
btmtkuart.c Bluetooth: btmtkuart: add an implementation for clock osc property 2019-07-06 13:00:04 +02:00
btqca.c Bluetooth: hci_qca: Add support for Qualcomm Bluetooth SoC WCN3991 2019-11-09 03:26:47 +01:00
btqca.h Bluetooth: hci_qca: Add support for Qualcomm Bluetooth SoC WCN3991 2019-11-09 03:26:47 +01:00
btqcomsmd.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
btrsi.c Bluetooth: btrsi: fix bt tx timeout issue 2018-09-27 12:53:40 +02:00
btrtl.c Bluetooth: btrtl: Use kvmalloc for FW allocations 2020-01-24 19:57:53 +01:00
btrtl.h Bluetooth: btrtl: HCI reset on close for Realtek BT chip 2019-07-06 12:32:50 +02:00
btsdio.c Bluetooth: btsdio: Check for valid packet type 2020-01-15 22:28:51 +01:00
btusb.c Bluetooth: btusb: Add support for 04ca:3021 QCA_ROME device 2020-01-06 14:36:00 +01:00
dtl1_cs.c networking: add and use skb_put_u8() 2017-06-16 11:48:40 -04:00
h4_recv.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
hci_ag6xx.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
hci_ath.c Bluetooth: hci_uart: check for missing tty operations 2019-07-31 13:17:33 -07:00
hci_bcm.c Bluetooth: hci_bcm: enable IRQ capability from devicetree 2020-01-15 22:32:31 +01:00
hci_bcsp.c Bluetooth: Fix invalid-free in bcsp_close() 2019-11-04 15:19:02 +01:00
hci_h4.c Bluetooth: hci_h4: Add support for ISO packets 2020-01-15 22:28:51 +01:00
hci_h5.c Bluetooth: hci_h5: Add support for ISO packets 2020-01-15 22:28:51 +01:00
hci_intel.c Bluetooth: hci_uart: check for missing tty operations 2019-07-31 13:17:33 -07:00
hci_ldisc.c Bluetooth: hci_uart: check for missing tty operations 2019-07-31 13:17:33 -07:00
hci_ll.c Revert "Bluetooth: hci_ll: set operational frequency earlier" 2019-10-16 20:33:16 +02:00
hci_mrvl.c Bluetooth: hci_uart: check for missing tty operations 2019-07-31 13:17:33 -07:00
hci_nokia.c Bluetooth: hci_nokia: Save a few cycles in 'nokia_enqueue()' 2019-10-16 19:26:40 +02:00
hci_qca.c Bluetooth: hci_qca: Enable power off/on support during hci down/up for QCA Rome 2020-01-16 06:30:35 +01:00
hci_serdev.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
hci_uart.h Bluetooth: hci_h4: Add support for ISO packets 2020-01-15 22:28:51 +01:00
hci_vhci.c Bluetooth: hci_vhci: Add support for ISO packets 2020-01-15 22:28:51 +01:00
Kconfig Bluetooth: btwilink: drop superseded driver 2019-10-16 21:12:52 +02:00
Makefile Bluetooth: btwilink: drop superseded driver 2019-10-16 21:12:52 +02:00