Merge tag 'for-v3.8' of git://git.infradead.org/users/cbou/linux-pstore

Pull pstore update from Anton Vorontsov:
 "Here are just a few fixups for the pstore subsystem, nothing special
  this time"

* tag 'for-v3.8' of git://git.infradead.org/users/cbou/linux-pstore:
  pstore/ftrace: Adjust for ftrace_ops->func prototype change
  pstore/ram: Fix bounds checks for mem_size, record_size, console_size and ftrace_size
  pstore/ram: Fix undefined usage of rounddown_pow_of_two(0)
  pstore/ram: Fixup section annotations

diff --git a/fs/pstore/ftrace.c b/fs/pstore/ftrace.c
index 2d57e1a..43b1280 100644 (file)
--- a/fs/pstore/ftrace.c
+++ b/fs/pstore/ftrace.c
@@ -28,7 +28,9 @@
 #include "internal.h"
 
 static void notrace pstore_ftrace_call(unsigned long ip,
-                                      unsigned long parent_ip)
+                                      unsigned long parent_ip,
+                                      struct ftrace_ops *op,
+                                      struct pt_regs *regs)
 {
        unsigned long flags;
        struct pstore_ftrace_record rec = {};

diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index 2bfa36e..f883e7e 100644 (file)
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -188,7 +188,7 @@ static int notrace ramoops_pstore_write_buf(enum pstore_type_id type,
                                            struct pstore_info *psi)
 {
        struct ramoops_context *cxt = psi->data;
-       struct persistent_ram_zone *prz = cxt->przs[cxt->dump_write_cnt];
+       struct persistent_ram_zone *prz;
        size_t hlen;
 
        if (type == PSTORE_TYPE_CONSOLE) {
@@ -225,6 +225,11 @@ static int notrace ramoops_pstore_write_buf(enum pstore_type_id type,
        if (part != 1)
                return -ENOSPC;
 
+       if (!cxt->przs)
+               return -ENOSPC;
+
+       prz = cxt->przs[cxt->dump_write_cnt];
+
        hlen = ramoops_write_kmsg_hdr(prz);
        if (size + hlen > prz->buffer_size)
                size = prz->buffer_size - hlen;
@@ -286,8 +291,9 @@ static void ramoops_free_przs(struct ramoops_context *cxt)
        kfree(cxt->przs);
 }
 
-static int ramoops_init_przs(struct device *dev, struct ramoops_context *cxt,
-                             phys_addr_t *paddr, size_t dump_mem_sz)
+static int __devinit ramoops_init_przs(struct device *dev,
+                                      struct ramoops_context *cxt,
+                                      phys_addr_t *paddr, size_t dump_mem_sz)
 {
        int err = -ENOMEM;
        int i;
@@ -295,6 +301,11 @@ static int ramoops_init_przs(struct device *dev, struct ramoops_context *cxt,
        if (!cxt->record_size)
                return 0;
 
+       if (*paddr + dump_mem_sz - cxt->phys_addr > cxt->size) {
+               dev_err(dev, "no room for dumps\n");
+               return -ENOMEM;
+       }
+
        cxt->max_dump_cnt = dump_mem_sz / cxt->record_size;
        if (!cxt->max_dump_cnt)
                return -ENOMEM;
@@ -325,15 +336,20 @@ fail_prz:
        return err;
 }
 
-static int ramoops_init_prz(struct device *dev, struct ramoops_context *cxt,
-                           struct persistent_ram_zone **prz,
-                           phys_addr_t *paddr, size_t sz, u32 sig)
+static int __devinit ramoops_init_prz(struct device *dev,
+                                     struct ramoops_context *cxt,
+                                     struct persistent_ram_zone **prz,
+                                     phys_addr_t *paddr, size_t sz, u32 sig)
 {
        if (!sz)
                return 0;
 
-       if (*paddr + sz > *paddr + cxt->size)
+       if (*paddr + sz - cxt->phys_addr > cxt->size) {
+               dev_err(dev, "no room for mem region (0x%zx@0x%llx) in (0x%lx@0x%llx)\n",
+                       sz, (unsigned long long)*paddr,
+                       cxt->size, (unsigned long long)cxt->phys_addr);
                return -ENOMEM;
+       }
 
        *prz = persistent_ram_new(*paddr, sz, sig, cxt->ecc_size);
        if (IS_ERR(*prz)) {
@@ -373,10 +389,14 @@ static int __devinit ramoops_probe(struct platform_device *pdev)
                goto fail_out;
        }
 
-       pdata->mem_size = rounddown_pow_of_two(pdata->mem_size);
-       pdata->record_size = rounddown_pow_of_two(pdata->record_size);
-       pdata->console_size = rounddown_pow_of_two(pdata->console_size);
-       pdata->ftrace_size = rounddown_pow_of_two(pdata->ftrace_size);
+       if (!is_power_of_2(pdata->mem_size))
+               pdata->mem_size = rounddown_pow_of_two(pdata->mem_size);
+       if (!is_power_of_2(pdata->record_size))
+               pdata->record_size = rounddown_pow_of_two(pdata->record_size);
+       if (!is_power_of_2(pdata->console_size))
+               pdata->console_size = rounddown_pow_of_two(pdata->console_size);
+       if (!is_power_of_2(pdata->ftrace_size))
+               pdata->ftrace_size = rounddown_pow_of_two(pdata->ftrace_size);
 
        cxt->dump_read_cnt = 0;
        cxt->size = pdata->mem_size;