[android-common:android15-6.6-2026-01 28/28] drivers/dma/idxd/device.c:495 idxd_cmd_exec() warn: mixing irqsave and irq

[kernel test robot <lkp@intel.com>]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
TO: cros-kernel-buildreports@googlegroups.com

tree:   https://android.googlesource.com/kernel/common android15-6.6-2026-01
head:   53e6e091166efc1ea0348a6aee2b12cc133ad102
commit: c0409dd3d151f661e7e57b901a81a02565df163c [28/28] dmaengine: idxd: use spin_lock_irqsave before wait_event_lock_irq
:::::: branch date: 3 hours ago
:::::: commit date: 2 years, 7 months ago
config: x86_64-randconfig-r071-20260421 (https://download.01.org/0day-ci/archive/20260423/202604231234.LuWmruJd-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
smatch: v0.5.0-9007-gcf3ea02b

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Fixes: c0409dd3d151 ("dmaengine: idxd: use spin_lock_irqsave before wait_event_lock_irq")
| Reported-by: kernel test robot <lkp@intel.com>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Closes: https://lore.kernel.org/r/202604231234.LuWmruJd-lkp@intel.com/

smatch warnings:
drivers/dma/idxd/device.c:495 idxd_cmd_exec() warn: mixing irqsave and irq

vim +495 drivers/dma/idxd/device.c

bfe1d56091c1a40 Dave Jiang     2020-01-21  473  
0d5c10b4c84d6ae Dave Jiang     2020-06-26  474  static void idxd_cmd_exec(struct idxd_device *idxd, int cmd_code, u32 operand,
0d5c10b4c84d6ae Dave Jiang     2020-06-26  475  			  u32 *status)
bfe1d56091c1a40 Dave Jiang     2020-01-21  476  {
bfe1d56091c1a40 Dave Jiang     2020-01-21  477  	union idxd_command_reg cmd;
0d5c10b4c84d6ae Dave Jiang     2020-06-26  478  	DECLARE_COMPLETION_ONSTACK(done);
53499d1fc11267e Dave Jiang     2021-06-03  479  	u32 stat;
c0409dd3d151f66 Rex Zhang      2023-09-16  480  	unsigned long flags;
bfe1d56091c1a40 Dave Jiang     2020-01-21  481  
89e3becd8f821e5 Dave Jiang     2021-02-01  482  	if (idxd_device_is_halted(idxd)) {
89e3becd8f821e5 Dave Jiang     2021-02-01  483  		dev_warn(&idxd->pdev->dev, "Device is HALTED!\n");
28ac8e03c43dfc6 Colin Ian King 2021-04-15  484  		if (status)
89e3becd8f821e5 Dave Jiang     2021-02-01  485  			*status = IDXD_CMDSTS_HW_ERR;
89e3becd8f821e5 Dave Jiang     2021-02-01  486  		return;
89e3becd8f821e5 Dave Jiang     2021-02-01  487  	}
89e3becd8f821e5 Dave Jiang     2021-02-01  488  
bfe1d56091c1a40 Dave Jiang     2020-01-21  489  	memset(&cmd, 0, sizeof(cmd));
bfe1d56091c1a40 Dave Jiang     2020-01-21  490  	cmd.cmd = cmd_code;
bfe1d56091c1a40 Dave Jiang     2020-01-21  491  	cmd.operand = operand;
0d5c10b4c84d6ae Dave Jiang     2020-06-26  492  	cmd.int_req = 1;
0d5c10b4c84d6ae Dave Jiang     2020-06-26  493  
c0409dd3d151f66 Rex Zhang      2023-09-16  494  	spin_lock_irqsave(&idxd->cmd_lock, flags);
0d5c10b4c84d6ae Dave Jiang     2020-06-26 @495  	wait_event_lock_irq(idxd->cmd_waitq,
0d5c10b4c84d6ae Dave Jiang     2020-06-26  496  			    !test_bit(IDXD_FLAG_CMD_RUNNING, &idxd->flags),
53b2ee7f637c4f1 Dave Jiang     2021-04-20  497  			    idxd->cmd_lock);
0d5c10b4c84d6ae Dave Jiang     2020-06-26  498  
bfe1d56091c1a40 Dave Jiang     2020-01-21  499  	dev_dbg(&idxd->pdev->dev, "%s: sending cmd: %#x op: %#x\n",
bfe1d56091c1a40 Dave Jiang     2020-01-21  500  		__func__, cmd_code, operand);
0d5c10b4c84d6ae Dave Jiang     2020-06-26  501  
ff18de55a62f0e8 Dave Jiang     2020-08-28  502  	idxd->cmd_status = 0;
0d5c10b4c84d6ae Dave Jiang     2020-06-26  503  	__set_bit(IDXD_FLAG_CMD_RUNNING, &idxd->flags);
0d5c10b4c84d6ae Dave Jiang     2020-06-26  504  	idxd->cmd_done = &done;
bfe1d56091c1a40 Dave Jiang     2020-01-21  505  	iowrite32(cmd.bits, idxd->reg_base + IDXD_CMD_OFFSET);
bfe1d56091c1a40 Dave Jiang     2020-01-21  506  
0d5c10b4c84d6ae Dave Jiang     2020-06-26  507  	/*
0d5c10b4c84d6ae Dave Jiang     2020-06-26  508  	 * After command submitted, release lock and go to sleep until
0d5c10b4c84d6ae Dave Jiang     2020-06-26  509  	 * the command completes via interrupt.
0d5c10b4c84d6ae Dave Jiang     2020-06-26  510  	 */
c0409dd3d151f66 Rex Zhang      2023-09-16  511  	spin_unlock_irqrestore(&idxd->cmd_lock, flags);
0d5c10b4c84d6ae Dave Jiang     2020-06-26  512  	wait_for_completion(&done);
53499d1fc11267e Dave Jiang     2021-06-03  513  	stat = ioread32(idxd->reg_base + IDXD_CMDSTS_OFFSET);
f9f4082dbc56c40 Dave Jiang     2021-08-24  514  	spin_lock(&idxd->cmd_lock);
53499d1fc11267e Dave Jiang     2021-06-03  515  	if (status)
53499d1fc11267e Dave Jiang     2021-06-03  516  		*status = stat;
53499d1fc11267e Dave Jiang     2021-06-03  517  	idxd->cmd_status = stat & GENMASK(7, 0);
ff18de55a62f0e8 Dave Jiang     2020-08-28  518  
0d5c10b4c84d6ae Dave Jiang     2020-06-26  519  	__clear_bit(IDXD_FLAG_CMD_RUNNING, &idxd->flags);
0d5c10b4c84d6ae Dave Jiang     2020-06-26  520  	/* Wake up other pending commands */
0d5c10b4c84d6ae Dave Jiang     2020-06-26  521  	wake_up(&idxd->cmd_waitq);
f9f4082dbc56c40 Dave Jiang     2021-08-24  522  	spin_unlock(&idxd->cmd_lock);
bfe1d56091c1a40 Dave Jiang     2020-01-21  523  }
bfe1d56091c1a40 Dave Jiang     2020-01-21  524  

:::::: The code at line 495 was first introduced by commit
:::::: 0d5c10b4c84d6ae6255129e5f16a0d2119c74334 dmaengine: idxd: add work queue drain support

:::::: TO: Dave Jiang <dave.jiang@intel.com>
:::::: CC: Vinod Koul <vkoul@kernel.org>

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