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| author | Logan Gunthorpe <logang@deltatee.com> | 2019-08-22 19:10:13 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2019-09-06 00:47:30 +0300 |
| commit | e499081da1a247a8a5a234211c7127fb0b91ca92 (patch) | |
| tree | c9d1a45ef6093df6123020fb2b4b21dd3f9f867f /drivers/pci/pci.c | |
| parent | 273b177cac4b649c3c6d448e85bbc64cebfe7a0a (diff) | |
| download | linux-e499081da1a247a8a5a234211c7127fb0b91ca92.tar.xz | |
PCI: Force trailing new line to resource_alignment_param in sysfs
When 'pci=resource_alignment=' is specified on the command line, there is
no trailing new line. Then, when it's read through the corresponding sysfs
attribute, there will be no newline and a cat command will not show
correctly in a shell. If the parameter is set through sysfs a new line will
be stored and it will 'cat' correctly.
To solve this, append a new line character in the show function if one does
not already exist.
Link: https://lore.kernel.org/r/20190822161013.5481-4-logang@deltatee.com
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index ff3abc577a25..5f70ff1031d2 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -6126,6 +6126,16 @@ static ssize_t resource_alignment_show(struct bus_type *bus, char *buf) count = snprintf(buf, PAGE_SIZE, "%s", resource_alignment_param); spin_unlock(&resource_alignment_lock); + /* + * When set by the command line, resource_alignment_param will not + * have a trailing line feed, which is ugly. So conditionally add + * it here. + */ + if (count >= 2 && buf[count - 2] != '\n' && count < PAGE_SIZE - 1) { + buf[count - 1] = '\n'; + buf[count++] = 0; + } + return count; } |