From: Dan Carpenter <dan.carpenter@oracle.com>
To: Paulo Miguel Almeida <paulo.miguel.almeida.rodenas@gmail.com>
Cc: gregkh@linuxfoundation.org, realwakka@gmail.com,
linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3] staging: pi433: add debugfs interface
Date: Mon, 31 Jan 2022 16:45:58 +0300 [thread overview]
Message-ID: <20220131134558.GL1951@kadam> (raw)
In-Reply-To: <YfX+llwDWZZMz+NY@mail.google.com>
On Sun, Jan 30, 2022 at 03:57:26PM +1300, Paulo Miguel Almeida wrote:
> @@ -1102,12 +1104,75 @@ static const struct file_operations pi433_fops = {
> .llseek = no_llseek,
> };
>
> +static int pi433_debugfs_regs_show(struct seq_file *m, void *p)
> +{
> + struct pi433_device *dev;
> + u8 reg_data[114];
> + int i;
> + char *fmt = "0x%02x, 0x%02x\n";
> + int ret = 0;
No need to initialize. Bogus initializers just disable ten thousand
person hours spent developing static analysis.
> +
> + dev = m->private;
> +
> + mutex_lock(&dev->tx_fifo_lock);
> + mutex_lock(&dev->rx_lock);
> +
> + // wait for on-going operations to finish
> + ret = wait_event_interruptible(dev->rx_wait_queue, !dev->tx_active);
> + if (ret)
> + return ret;
Drop the two mutexes before returning.
> +
> + ret = wait_event_interruptible(dev->tx_wait_queue, !dev->rx_active);
> + if (ret)
> + return ret;
Drop the mutexes.
> +
> + // skip FIFO register (0x0) otherwise this can affect some of uC ops
> + for (i = 1; i < 0x50; i++)
> + reg_data[i] = rf69_read_reg(dev->spi, i);
> +
> + reg_data[REG_TESTLNA] = rf69_read_reg(dev->spi, REG_TESTLNA);
> + reg_data[REG_TESTPA1] = rf69_read_reg(dev->spi, REG_TESTPA1);
> + reg_data[REG_TESTPA2] = rf69_read_reg(dev->spi, REG_TESTPA2);
> + reg_data[REG_TESTDAGC] = rf69_read_reg(dev->spi, REG_TESTDAGC);
> + reg_data[REG_TESTAFC] = rf69_read_reg(dev->spi, REG_TESTAFC);
> +
> + seq_puts(m, "# reg, val\n");
> +
> + for (i = 1; i < 0x50; i++)
> + seq_printf(m, fmt, i, reg_data[i]);
> +
> + seq_printf(m, fmt, REG_TESTLNA, reg_data[REG_TESTLNA]);
> + seq_printf(m, fmt, REG_TESTPA1, reg_data[REG_TESTPA1]);
> + seq_printf(m, fmt, REG_TESTPA2, reg_data[REG_TESTPA2]);
> + seq_printf(m, fmt, REG_TESTDAGC, reg_data[REG_TESTDAGC]);
> + seq_printf(m, fmt, REG_TESTAFC, reg_data[REG_TESTAFC]);
> +
> + mutex_unlock(&dev->rx_lock);
> + mutex_unlock(&dev->tx_fifo_lock);
> +
> + return ret;
> +}
regards,
dan carpenter
next prev parent reply other threads:[~2022-01-31 13:46 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-23 7:38 [PATCH 0/2] staging: pi433: add debugfs interface Paulo Miguel Almeida
2022-01-23 7:39 ` [PATCH 1/2] staging: pi433: add missing register contants Paulo Miguel Almeida
2022-01-23 7:40 ` [PATCH 2/2] staging: pi433: add debugfs interface Paulo Miguel Almeida
2022-01-23 11:20 ` Greg KH
2022-01-24 4:14 ` Paulo Miguel Almeida
2022-01-24 4:25 ` [PATCH v2 0/2] " Paulo Miguel Almeida
2022-01-24 4:26 ` [PATCH v2 1/2] staging: pi433: add missing register contants Paulo Miguel Almeida
2022-01-24 4:27 ` [PATCH v2 2/2] staging: pi433: add debugfs interface Paulo Miguel Almeida
2022-01-26 12:03 ` Greg KH
2022-01-29 3:35 ` Paulo Miguel Almeida
2022-01-26 13:21 ` Dan Carpenter
2022-01-29 3:30 ` Paulo Miguel Almeida
2022-01-30 2:57 ` [PATCH v3] " Paulo Miguel Almeida
2022-01-31 13:45 ` Dan Carpenter [this message]
2022-01-31 16:45 ` Greg KH
2022-01-31 19:37 ` Paulo Miguel Almeida
2022-02-04 5:06 ` [PATCH v4] " Paulo Miguel Almeida
2022-02-04 8:04 ` [PATCH v5] " Paulo Miguel Almeida
2022-02-04 9:02 ` Dan Carpenter
2022-02-04 8:55 ` [PATCH v4] " Dan Carpenter
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